Crosswinds ahead
Crosswinds ahead - W349
Road Signs - W349
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Crosswinds ahead
Category:
Safety Sign Code:
- W349
Product Description
Crosswinds Ahead – W349 Road Sign
The W349 Crosswinds Ahead road sign is a South African warning sign used to alert drivers and other road users that severe crosswinds may occur on the roadway ahead.
The official South African road traffic sign designation is W349 CROSSWINDS AHEAD. The sign warns of crosswinds that may be strong enough to deflect a vehicle from its path.
W349 is particularly relevant on exposed sections of road where strong side winds can affect vehicle stability and directional control.
What Does the W349 Road Sign Mean?
W349 means Crosswinds Ahead. It warns drivers that severe winds may blow across the roadway and may affect the path of a vehicle.
The warning is intended for locations where crosswinds are known to occur and can become dangerous for road users.
W349 is a warning sign. It does not itself impose a specific speed limit or require vehicles to stop.
Why Is the W349 Crosswinds Sign Important?
Strong side winds can affect the movement of a vehicle, particularly when the vehicle has a large side area exposed to the wind.
A driver may need to make steering adjustments to maintain the intended path of travel when passing through a section exposed to severe crosswinds.
Advance warning allows drivers to anticipate the condition before entering the exposed section and adjust their driving appropriately.
When Is W349 Used?
The SARTSM states that W349 is used to warn road users about the possibility of severe crosswinds ahead that are capable of deflecting a vehicle from its path.
The sign should be displayed in advance of sections of roadway where severe crosswinds are known to occur, even if they occur only occasionally.
Where Are Crosswinds Most Common?
Crosswind hazards can occur on exposed sections of road where strong winds can move across the direction of travel.
The SARTSM notes that these locations tend to occur particularly in mountainous and undulating areas.
Other exposed locations may also require consideration depending on local wind conditions and the characteristics of the road.
W349 and Strong Side Winds
A crosswind is wind travelling across the roadway rather than directly along the direction of travel.
When the wind becomes sufficiently strong, it can affect the vehicle's position within the lane or cause the vehicle to move away from its intended path.
W349 provides advance warning that this type of condition may occur.
W349 and Vehicle Deflection
The key hazard addressed by W349 is vehicle deflection.
Strong crosswinds can push a vehicle sideways, requiring the driver to respond to the changing conditions.
The effect can vary according to wind strength, vehicle design, speed, road alignment and other environmental conditions.
Which Vehicles Can Be Affected by Crosswinds?
Crosswinds can affect different types of vehicles in different ways.
Vehicles with large exposed side areas can be particularly affected by strong side winds.
Examples include:
- Trucks
- Articulated vehicles
- Buses
- Coaches
- Caravans
- Trailers
- High-sided commercial vehicles
- Other vehicles with significant side exposure
Smaller vehicles can also be affected when wind conditions are severe.
How Should Drivers Respond to W349?
Drivers approaching a W349 sign should prepare for strong crosswinds and adjust their driving to the actual conditions.
Drivers should:
- Reduce speed where appropriate.
- Maintain firm control of the vehicle.
- Keep a suitable position within the lane.
- Be prepared for sudden sideways movement.
- Allow additional space from vulnerable vehicles where appropriate.
- Take extra care when passing exposed sections.
- Remain alert to changing wind conditions.
The appropriate speed and driving response depend on the actual wind, road, traffic and vehicle conditions.
Does W349 Set a Speed Limit?
No. W349 is a warning sign and does not itself establish a legal speed limit.
It warns that severe crosswinds may affect vehicles and that drivers should take appropriate caution.
Where a separate regulatory speed limit applies, it is communicated by the relevant regulatory sign.
W349 and Wind Speed
W349 does not display a specific wind-speed threshold.
The sign is used where local conditions are known to create severe crosswinds capable of affecting vehicle path.
Actual wind strength can vary significantly over time, so drivers should always respond to current conditions.
W349 and a Permanent Windsock
The SARTSM recommends the use of a permanent windsock at the actual site of the crosswind hazard.
A windsock can provide a visible indication of wind direction and help road users recognise the exposed nature of the location.
W349 provides the advance warning before drivers reach the hazardous section, while the windsock is positioned at the actual site of the hazard.
W349 and Supplementary Distance Plates
The SARTSM recommends using a supplementary IN1.2 distance plate where appropriate to indicate the distance over which severe crosswinds may be expected.
This can provide additional information where the crosswind hazard extends over a longer section of roadway.
How Long Can a Crosswind Hazard Continue?
Crosswind exposure can extend over a relatively short or long section of roadway depending on the surrounding terrain and road alignment.
Where the affected section is sufficiently long, supplementary distance information can help drivers understand that the crosswind hazard continues for a specific distance.
W349 Sign Placement
W349 should be displayed in advance of the section where crosswinds are likely to become dangerous.
The SARTSM states that the warning should be located in accordance with the applicable Table 3.1 or Figure 3.1 requirements.
The final position should take account of the operating speed, visibility, road alignment and characteristics of the exposed section.
W349 and Road Visibility
The warning sign should be clearly visible to approaching road users before they enter the crosswind section.
Potential visibility problems include:
- Road curves
- Hills and crests
- Vegetation
- Buildings
- Other traffic signs
- Advertising structures
- Roadside equipment
- Poor sign positioning
The sign should remain clean, legible and unobstructed.
W349 and Mountain Roads
Mountain roads can contain exposed sections where strong winds pass across the roadway.
The SARTSM identifies mountainous and undulating areas as locations where crosswind warning signs tend to be relevant.
Where severe crosswinds are known to occur, W349 can provide advance warning to approaching drivers.
W349 on Elevated and Exposed Roads
Roads across exposed terrain may experience stronger side winds because there are fewer natural features to provide shelter from the wind.
Where the crosswinds are severe enough to create a vehicle-deflection hazard, W349 may be appropriate.
W349 and Bridges
Some bridges can be exposed to strong winds, particularly where the roadway crosses open terrain or water.
Where severe crosswinds are known to occur and can affect vehicles, the appropriate warning arrangement should be considered based on the actual site conditions.
W349 and Open Terrain
Open landscapes can expose vehicles to strong side winds.
Roads through exposed terrain should be assessed where local wind conditions are known to create a significant crosswind hazard.
W349 and High-Sided Vehicles
High-sided vehicles have a larger surface area exposed to side winds.
Strong crosswinds can therefore have a noticeable effect on trucks, buses, trailers and other vehicles with large side profiles.
Drivers of such vehicles should take the warning seriously and adjust their driving according to the prevailing conditions.
W349 and Trucks
Truck drivers should be particularly alert when travelling through areas known for severe crosswinds.
A heavily loaded vehicle and an empty or lightly loaded vehicle may respond differently to strong side winds.
Drivers should maintain proper control and adapt speed to the conditions.
W349 and Buses
Buses and coaches can also experience side forces in strong crosswinds because of their size and body profile.
Drivers should remain alert to changes in wind strength and maintain appropriate vehicle control.
W349 and Trailers
Trailers can be affected by strong side winds, particularly where they have large exposed side surfaces.
Drivers should allow suitable space and remain prepared for changes in vehicle movement through exposed areas.
W349 and Caravans
Vehicles towing caravans may also be affected by strong crosswinds.
Drivers should travel at an appropriate speed and maintain proper control of both the towing vehicle and caravan.
W349 and Motorcycles
Motorcyclists can be sensitive to strong side winds because a motorcycle can be displaced laterally by sudden wind forces.
Riders should reduce speed where appropriate and maintain control while remaining alert to sudden changes in wind direction or strength.
W349 and Cyclists
Cyclists can also be affected by strong crosswinds, particularly on exposed roads, bridges and mountain routes.
Other road users should remain aware of cyclists who may be affected by sudden lateral movement caused by wind.
W349 During Storms
Storm conditions can produce rapidly changing wind strength and direction.
Drivers approaching a W349 location should take current weather conditions seriously and adjust their driving to suit the visibility and wind conditions.
W349 During Severe Weather
Crosswind conditions can change quickly during severe weather.
A road that is normally calm may experience strong gusts during a storm or weather system.
Drivers should therefore remain alert even when the wind initially appears moderate.
W349 and Sudden Wind Gusts
Strong gusts can affect a vehicle more suddenly than steady winds.
This is particularly relevant when a vehicle moves from a sheltered area into an exposed section of road.
Drivers should be prepared for changes in wind conditions when approaching a W349 warning.
W349 at Roadside Openings
Changes in surrounding terrain can expose vehicles to stronger winds.
For example, a roadway may move from a sheltered cutting into open terrain where crosswinds become more noticeable.
Advance warning can prepare drivers for these changes where severe crosswinds are known to occur.
W349 at Night
Crosswinds can be difficult for drivers to judge visually at night because wind itself may not be visible.
Advance warning becomes especially useful because it informs drivers of the known wind hazard before they reach the exposed section.
The sign should remain visible and legible under night-time conditions through the use of compliant retroreflective materials.
W349 and Road Surface Conditions
Drivers should also consider the condition of the road surface when strong winds are present.
Wet, uneven or otherwise challenging road conditions can add to the difficulty of maintaining vehicle control.
Where additional hazards are present, the appropriate warning and regulatory signs should be considered separately.
W349 and Vehicle Control
The main purpose of W349 is to prepare drivers for the possibility of vehicle deflection caused by strong crosswinds.
Drivers should avoid unnecessary sudden steering movements and maintain a suitable speed for the conditions.
W349 and Overtaking
Drivers should take additional care when overtaking or passing large vehicles in strong crosswinds.
Changes in airflow around large vehicles and sudden exposure to open wind conditions can affect vehicle movement.
Drivers should maintain appropriate space and respond to the actual traffic conditions.
W349 and Passing Large Trucks
A smaller vehicle can experience different wind conditions when passing a large truck or bus.
On a road section already affected by strong crosswinds, drivers should remain alert to changes in vehicle movement while passing other vehicles.
Temporary Crosswinds Sign – TW349
The temporary version of W349 is designated TW349.
The SARTSM states that TW349 may be used under the same general circumstances as the permanent CROSSWINDS sign where a roadworks detour is located in an area subject to severe crosswinds.
This provides a temporary warning where the detour creates a route through an area with a known crosswind hazard.
TW349 and Roadworks Detours
Roadworks can temporarily move traffic onto a different alignment or detour route.
If the temporary route passes through an area known for severe crosswinds, TW349 may be used to warn approaching road users.
The temporary warning should remain relevant only while the temporary roadworks arrangement or crosswind hazard applies.
Permanent W349 Sign Design and Colours
The standard permanent W349 warning sign uses:
- Triangle: Red retroreflective
- Symbol: Black semi-matt
- Background: White retroreflective
The sign uses the standard triangular warning-sign format to communicate the crosswind hazard.
Temporary TW349 Sign Design and Colours
The temporary TW349 warning sign uses:
- Triangle: Red retroreflective
- Symbol: Black semi-matt
- Background: Yellow retroreflective
The yellow background identifies the sign as a temporary warning sign.
Retroreflective W349 Road Signs
Retroreflective materials help the sign remain visible when illuminated by vehicle headlights.
For public-road applications, W349 and TW349 signs should be manufactured according to the applicable South African road traffic sign specifications.
W349 Sign Size
The appropriate W349 sign size depends on the road environment and applicable South African traffic-sign requirements.
Factors that may influence the selected size include:
- Operating speed
- Road classification
- Viewing distance
- Traffic volume
- Roadside environment
- Available installation space
For public roads, the final sign size should be selected in accordance with the applicable SARTSM requirements and the responsible road authority.
W349 and Windsock Placement
The SARTSM recommends a permanent windsock at the actual site of the crosswind hazard.
The windsock should be positioned where it can provide a useful visual indication of the wind condition without creating an additional obstruction or hazard.
The advance W349 sign and the windsock therefore serve different purposes: the sign provides advance warning, while the windsock indicates conditions at the hazard location.
W349 and Distance Information
A supplementary IN1.2 distance plate can indicate the length over which severe crosswinds may be expected.
This additional information can be useful where the exposed road section extends for a significant distance.
W349 Maintenance
Crosswind warning installations should be inspected regularly to ensure that signs remain visible and legible.
Maintenance checks can include:
- Cleaning the sign face
- Checking for fading
- Checking for physical damage
- Checking mounting hardware
- Removing vegetation or other obstructions
- Checking the condition of the windsock
- Checking that supplementary plates remain legible
Windsocks should also be inspected to ensure that they remain securely mounted and can move freely in response to wind.
W349 and Wind Monitoring
At sites with significant crosswind concerns, wind conditions may be monitored using appropriate local systems.
However, W349 is based on the known hazard at the location rather than displaying a real-time wind-speed measurement.
W349 and Variable Wind Conditions
Crosswinds may vary according to season, weather, time of day and local terrain.
The SARTSM specifically allows W349 to be used where severe crosswinds are known to occur even if only occasionally.
This means the warning does not require the hazard to be present continuously throughout the year.
W349 on Public Roads in South Africa
On public roads, W349 and TW349 should be selected, positioned and installed according to the applicable South African road traffic sign requirements and the requirements of the responsible road authority.
The warning arrangement should reflect the actual crosswind conditions at the site.
W349 on Private Roads and Properties
Similar crosswind warning signage may also be used on private roads and controlled properties where strong winds create a traffic-management concern.
Potential applications include:
- Mining properties
- Industrial sites
- Private estates
- Mountain resorts
- Farms
- Game reserves
- Lodges
- Large private access roads
- Construction sites
- Commercial properties in exposed areas
On private property, the warning can form part of an internal traffic-management system based on the conditions of the site.
W349 at Mining Sites
Mining properties can contain exposed haul routes, elevated roads and open sections where strong winds affect vehicle movement.
Similar crosswind warning signage can help communicate the hazard to employees, contractors and other authorised road users.
W349 at Construction Sites
Construction areas can temporarily change traffic routes and expose vehicles to different wind conditions.
Where a temporary roadworks detour passes through an area affected by severe crosswinds, TW349 may be appropriate.
W349 at Industrial Facilities
Large industrial facilities may have open access roads, elevated sections or exposed areas where strong side winds can affect vehicle movement.
Where appropriate, crosswind warning signage can form part of the site's internal traffic-management arrangements.
W349 for Commercial Properties
Commercial properties with large open parking areas, elevated access roads or exposed approaches may experience strong wind conditions.
Where crosswinds create a genuine vehicle-control concern, suitable warning signage can communicate the hazard to drivers.
W349 for Rural Properties
Rural roads and private access routes can pass through exposed terrain where strong side winds occur.
Similar W349-style warning signage may be useful where local conditions create a significant crosswind hazard.
Who May Need W349 Crosswinds Signs?
W349 and TW349 signage may be relevant to:
- Road authorities
- Municipalities
- Traffic-management contractors
- Road construction contractors
- Road maintenance contractors
- Mining operations
- Industrial facilities
- Property developers
- Private estate managers
- Farm owners and managers
- Resorts and lodges
- Commercial property managers
Benefits of W349 Crosswinds Warning Signs
- Warns drivers about severe crosswinds ahead.
- Alerts road users to the possibility of vehicle deflection.
- Provides advance information before an exposed road section.
- Can be used where severe crosswinds occur occasionally as well as regularly.
- Can be supplemented with distance information.
- Can be supported by a permanent windsock at the actual hazard location.
- TW349 provides a temporary option for suitable roadworks detours.
- Can form part of a wider road and traffic-management system.
Frequently Asked Questions About W349 Road Signs
What does W349 mean?
W349 means Crosswinds Ahead. It warns about severe crosswinds that may deflect a vehicle from its path.
What is the official name of W349?
The official South African designation is CROSSWINDS AHEAD.
What does the W349 sign warn about?
It warns about the possibility of severe crosswinds that may affect the direction or path of a vehicle.
Where is W349 normally used?
It is used in advance of road sections where severe crosswinds are known to occur, including locations where they occur only occasionally.
Are mountain roads suitable for W349?
Yes. The SARTSM notes that crosswind warning locations tend to occur in mountainous and undulating areas.
Can W349 be used on exposed roads?
Yes, where local wind conditions are known to create severe crosswinds capable of affecting vehicles.
Can W349 be used near bridges?
It may be appropriate where severe crosswinds are known to affect an exposed bridge or approach, subject to the applicable assessment and requirements.
Does W349 impose a speed limit?
No. W349 is a warning sign and does not itself establish a legal speed limit.
What should drivers do when they see W349?
Drivers should remain alert for strong side winds, reduce speed where appropriate and maintain proper control of the vehicle.
Can W349 be used for occasional crosswinds?
Yes. The SARTSM states that W349 may be used where severe crosswinds are known to occur even if they occur only occasionally.
What is TW349?
TW349 is the temporary Crosswinds warning sign.
When is TW349 used?
TW349 may be used where a roadworks detour is located in an area subject to severe crosswinds.
Can W349 be used with a windsock?
Yes. The SARTSM recommends a permanent windsock at the actual site of the crosswind hazard.
What is the purpose of a windsock?
A windsock provides a visible indication of wind direction at the actual crosswind hazard location.
Can W349 have a supplementary distance plate?
Yes. The SARTSM recommends an IN1.2 supplementary plate to indicate the distance over which severe crosswinds may be expected.
How long can the crosswind section be?
The affected distance depends on the local terrain and wind exposure. A supplementary distance plate can indicate the relevant distance where appropriate.
What colours does permanent W349 use?
The permanent sign uses a red retroreflective triangle, black semi-matt symbol and white retroreflective background.
What colours does TW349 use?
The temporary version uses a red retroreflective triangle, black semi-matt symbol and yellow retroreflective background.
Can crosswinds affect trucks?
Yes. Trucks and other high-sided vehicles may be affected by strong side winds because of their large exposed side areas.
Can crosswinds affect buses?
Yes. Buses and coaches may also be affected by strong crosswinds and should be driven according to the prevailing conditions.
Can crosswinds affect caravans?
Yes. Vehicles towing caravans can be affected by strong side winds, particularly on exposed roads.
Can crosswinds affect motorcycles?
Yes. Strong gusts can cause lateral movement and require careful vehicle control.
Can W349 be used on private property?
Similar crosswind warning signage may be used on private roads and controlled properties where strong winds create a traffic-management concern.
Can W349 be used at construction sites?
Yes. TW349 may be used where a suitable roadworks detour passes through an area subject to severe crosswinds.
Can W349 be used at mining sites?
Similar crosswind warning signage may be used on mining properties and access roads where strong winds create a relevant vehicle-control hazard.
Where should W349 be placed?
It should be displayed in advance of the section where crosswinds are likely to become dangerous, according to the applicable SARTSM requirements.
Is W349 a warning sign?
Yes. W349 is part of the W-series warning signs.
Is W349 the same as a wind warning sign?
W349 is the South African road-sign warning for severe crosswinds capable of affecting vehicle path.
Can W349 be used with other signs?
Yes. Other warning or regulatory signs may be required where additional hazards, restrictions or traffic controls apply.
Can Signs4SA supply W349 signs?
Yes. Signs4SA can assist with W349 Crosswinds Ahead signs, temporary TW349 signs, supplementary distance plates and related traffic signage.
Order W349 Crosswinds Ahead Warning Signs
Need W349 Crosswinds Ahead signs for a mountain road, exposed route, bridge approach, mining site, rural road, construction detour, private estate or industrial property?
Signs4SA can assist with permanent and temporary crosswind warning signage and supplementary traffic-sign products for different road and traffic-management applications.
Contact Signs4SA with the W349 or TW349 code, required quantity, sign size, material and installation requirements to request a quotation.
One important feature of Crosswinds ahead signs is their high visibility. These signs are designed to be easily seen by drivers, even from a distance and in adverse weather conditions. Many Crosswinds ahead signs are also designed with reflective materials that make them visible at night.
Another important feature of Crosswinds ahead signs is their durability. Road signs are exposed to a wide range of environmental factors, including wind, rain, and extreme temperatures. As such, they need to be made from materials that can withstand these conditions and remain in good condition for years to come.
More About Crosswinds ahead
Crosswinds Ahead – W349 Road Sign
The W349 Crosswinds Ahead road sign is a South African warning sign used to alert drivers and other road users that severe crosswinds may occur on the roadway ahead.
The official South African road traffic sign designation is W349 CROSSWINDS AHEAD. The sign warns of crosswinds that may be strong enough to deflect a vehicle from its path.
W349 is particularly relevant on exposed sections of road where strong side winds can affect vehicle stability and directional control.
What Does the W349 Road Sign Mean?
W349 means Crosswinds Ahead. It warns drivers that severe winds may blow across the roadway and may affect the path of a vehicle.
The warning is intended for locations where crosswinds are known to occur and can become dangerous for road users.
W349 is a warning sign. It does not itself impose a specific speed limit or require vehicles to stop.
Why Is the W349 Crosswinds Sign Important?
Strong side winds can affect the movement of a vehicle, particularly when the vehicle has a large side area exposed to the wind.
A driver may need to make steering adjustments to maintain the intended path of travel when passing through a section exposed to severe crosswinds.
Advance warning allows drivers to anticipate the condition before entering the exposed section and adjust their driving appropriately.
When Is W349 Used?
The SARTSM states that W349 is used to warn road users about the possibility of severe crosswinds ahead that are capable of deflecting a vehicle from its path.
The sign should be displayed in advance of sections of roadway where severe crosswinds are known to occur, even if they occur only occasionally.
Where Are Crosswinds Most Common?
Crosswind hazards can occur on exposed sections of road where strong winds can move across the direction of travel.
The SARTSM notes that these locations tend to occur particularly in mountainous and undulating areas.
Other exposed locations may also require consideration depending on local wind conditions and the characteristics of the road.
W349 and Strong Side Winds
A crosswind is wind travelling across the roadway rather than directly along the direction of travel.
When the wind becomes sufficiently strong, it can affect the vehicle's position within the lane or cause the vehicle to move away from its intended path.
W349 provides advance warning that this type of condition may occur.
W349 and Vehicle Deflection
The key hazard addressed by W349 is vehicle deflection.
Strong crosswinds can push a vehicle sideways, requiring the driver to respond to the changing conditions.
The effect can vary according to wind strength, vehicle design, speed, road alignment and other environmental conditions.
Which Vehicles Can Be Affected by Crosswinds?
Crosswinds can affect different types of vehicles in different ways.
Vehicles with large exposed side areas can be particularly affected by strong side winds.
Examples include:
- Trucks
- Articulated vehicles
- Buses
- Coaches
- Caravans
- Trailers
- High-sided commercial vehicles
- Other vehicles with significant side exposure
Smaller vehicles can also be affected when wind conditions are severe.
How Should Drivers Respond to W349?
Drivers approaching a W349 sign should prepare for strong crosswinds and adjust their driving to the actual conditions.
Drivers should:
- Reduce speed where appropriate.
- Maintain firm control of the vehicle.
- Keep a suitable position within the lane.
- Be prepared for sudden sideways movement.
- Allow additional space from vulnerable vehicles where appropriate.
- Take extra care when passing exposed sections.
- Remain alert to changing wind conditions.
The appropriate speed and driving response depend on the actual wind, road, traffic and vehicle conditions.
Does W349 Set a Speed Limit?
No. W349 is a warning sign and does not itself establish a legal speed limit.
It warns that severe crosswinds may affect vehicles and that drivers should take appropriate caution.
Where a separate regulatory speed limit applies, it is communicated by the relevant regulatory sign.
W349 and Wind Speed
W349 does not display a specific wind-speed threshold.
The sign is used where local conditions are known to create severe crosswinds capable of affecting vehicle path.
Actual wind strength can vary significantly over time, so drivers should always respond to current conditions.
W349 and a Permanent Windsock
The SARTSM recommends the use of a permanent windsock at the actual site of the crosswind hazard.
A windsock can provide a visible indication of wind direction and help road users recognise the exposed nature of the location.
W349 provides the advance warning before drivers reach the hazardous section, while the windsock is positioned at the actual site of the hazard.
W349 and Supplementary Distance Plates
The SARTSM recommends using a supplementary IN1.2 distance plate where appropriate to indicate the distance over which severe crosswinds may be expected.
This can provide additional information where the crosswind hazard extends over a longer section of roadway.
How Long Can a Crosswind Hazard Continue?
Crosswind exposure can extend over a relatively short or long section of roadway depending on the surrounding terrain and road alignment.
Where the affected section is sufficiently long, supplementary distance information can help drivers understand that the crosswind hazard continues for a specific distance.
W349 Sign Placement
W349 should be displayed in advance of the section where crosswinds are likely to become dangerous.
The SARTSM states that the warning should be located in accordance with the applicable Table 3.1 or Figure 3.1 requirements.
The final position should take account of the operating speed, visibility, road alignment and characteristics of the exposed section.
W349 and Road Visibility
The warning sign should be clearly visible to approaching road users before they enter the crosswind section.
Potential visibility problems include:
- Road curves
- Hills and crests
- Vegetation
- Buildings
- Other traffic signs
- Advertising structures
- Roadside equipment
- Poor sign positioning
The sign should remain clean, legible and unobstructed.
W349 and Mountain Roads
Mountain roads can contain exposed sections where strong winds pass across the roadway.
The SARTSM identifies mountainous and undulating areas as locations where crosswind warning signs tend to be relevant.
Where severe crosswinds are known to occur, W349 can provide advance warning to approaching drivers.
W349 on Elevated and Exposed Roads
Roads across exposed terrain may experience stronger side winds because there are fewer natural features to provide shelter from the wind.
Where the crosswinds are severe enough to create a vehicle-deflection hazard, W349 may be appropriate.
W349 and Bridges
Some bridges can be exposed to strong winds, particularly where the roadway crosses open terrain or water.
Where severe crosswinds are known to occur and can affect vehicles, the appropriate warning arrangement should be considered based on the actual site conditions.
W349 and Open Terrain
Open landscapes can expose vehicles to strong side winds.
Roads through exposed terrain should be assessed where local wind conditions are known to create a significant crosswind hazard.
W349 and High-Sided Vehicles
High-sided vehicles have a larger surface area exposed to side winds.
Strong crosswinds can therefore have a noticeable effect on trucks, buses, trailers and other vehicles with large side profiles.
Drivers of such vehicles should take the warning seriously and adjust their driving according to the prevailing conditions.
W349 and Trucks
Truck drivers should be particularly alert when travelling through areas known for severe crosswinds.
A heavily loaded vehicle and an empty or lightly loaded vehicle may respond differently to strong side winds.
Drivers should maintain proper control and adapt speed to the conditions.
W349 and Buses
Buses and coaches can also experience side forces in strong crosswinds because of their size and body profile.
Drivers should remain alert to changes in wind strength and maintain appropriate vehicle control.
W349 and Trailers
Trailers can be affected by strong side winds, particularly where they have large exposed side surfaces.
Drivers should allow suitable space and remain prepared for changes in vehicle movement through exposed areas.
W349 and Caravans
Vehicles towing caravans may also be affected by strong crosswinds.
Drivers should travel at an appropriate speed and maintain proper control of both the towing vehicle and caravan.
W349 and Motorcycles
Motorcyclists can be sensitive to strong side winds because a motorcycle can be displaced laterally by sudden wind forces.
Riders should reduce speed where appropriate and maintain control while remaining alert to sudden changes in wind direction or strength.
W349 and Cyclists
Cyclists can also be affected by strong crosswinds, particularly on exposed roads, bridges and mountain routes.
Other road users should remain aware of cyclists who may be affected by sudden lateral movement caused by wind.
W349 During Storms
Storm conditions can produce rapidly changing wind strength and direction.
Drivers approaching a W349 location should take current weather conditions seriously and adjust their driving to suit the visibility and wind conditions.
W349 During Severe Weather
Crosswind conditions can change quickly during severe weather.
A road that is normally calm may experience strong gusts during a storm or weather system.
Drivers should therefore remain alert even when the wind initially appears moderate.
W349 and Sudden Wind Gusts
Strong gusts can affect a vehicle more suddenly than steady winds.
This is particularly relevant when a vehicle moves from a sheltered area into an exposed section of road.
Drivers should be prepared for changes in wind conditions when approaching a W349 warning.
W349 at Roadside Openings
Changes in surrounding terrain can expose vehicles to stronger winds.
For example, a roadway may move from a sheltered cutting into open terrain where crosswinds become more noticeable.
Advance warning can prepare drivers for these changes where severe crosswinds are known to occur.
W349 at Night
Crosswinds can be difficult for drivers to judge visually at night because wind itself may not be visible.
Advance warning becomes especially useful because it informs drivers of the known wind hazard before they reach the exposed section.
The sign should remain visible and legible under night-time conditions through the use of compliant retroreflective materials.
W349 and Road Surface Conditions
Drivers should also consider the condition of the road surface when strong winds are present.
Wet, uneven or otherwise challenging road conditions can add to the difficulty of maintaining vehicle control.
Where additional hazards are present, the appropriate warning and regulatory signs should be considered separately.
W349 and Vehicle Control
The main purpose of W349 is to prepare drivers for the possibility of vehicle deflection caused by strong crosswinds.
Drivers should avoid unnecessary sudden steering movements and maintain a suitable speed for the conditions.
W349 and Overtaking
Drivers should take additional care when overtaking or passing large vehicles in strong crosswinds.
Changes in airflow around large vehicles and sudden exposure to open wind conditions can affect vehicle movement.
Drivers should maintain appropriate space and respond to the actual traffic conditions.
W349 and Passing Large Trucks
A smaller vehicle can experience different wind conditions when passing a large truck or bus.
On a road section already affected by strong crosswinds, drivers should remain alert to changes in vehicle movement while passing other vehicles.
Temporary Crosswinds Sign – TW349
The temporary version of W349 is designated TW349.
The SARTSM states that TW349 may be used under the same general circumstances as the permanent CROSSWINDS sign where a roadworks detour is located in an area subject to severe crosswinds.
This provides a temporary warning where the detour creates a route through an area with a known crosswind hazard.
TW349 and Roadworks Detours
Roadworks can temporarily move traffic onto a different alignment or detour route.
If the temporary route passes through an area known for severe crosswinds, TW349 may be used to warn approaching road users.
The temporary warning should remain relevant only while the temporary roadworks arrangement or crosswind hazard applies.
Permanent W349 Sign Design and Colours
The standard permanent W349 warning sign uses:
- Triangle: Red retroreflective
- Symbol: Black semi-matt
- Background: White retroreflective
The sign uses the standard triangular warning-sign format to communicate the crosswind hazard.
Temporary TW349 Sign Design and Colours
The temporary TW349 warning sign uses:
- Triangle: Red retroreflective
- Symbol: Black semi-matt
- Background: Yellow retroreflective
The yellow background identifies the sign as a temporary warning sign.
Retroreflective W349 Road Signs
Retroreflective materials help the sign remain visible when illuminated by vehicle headlights.
For public-road applications, W349 and TW349 signs should be manufactured according to the applicable South African road traffic sign specifications.
W349 Sign Size
The appropriate W349 sign size depends on the road environment and applicable South African traffic-sign requirements.
Factors that may influence the selected size include:
- Operating speed
- Road classification
- Viewing distance
- Traffic volume
- Roadside environment
- Available installation space
For public roads, the final sign size should be selected in accordance with the applicable SARTSM requirements and the responsible road authority.
W349 and Windsock Placement
The SARTSM recommends a permanent windsock at the actual site of the crosswind hazard.
The windsock should be positioned where it can provide a useful visual indication of the wind condition without creating an additional obstruction or hazard.
The advance W349 sign and the windsock therefore serve different purposes: the sign provides advance warning, while the windsock indicates conditions at the hazard location.
W349 and Distance Information
A supplementary IN1.2 distance plate can indicate the length over which severe crosswinds may be expected.
This additional information can be useful where the exposed road section extends for a significant distance.
W349 Maintenance
Crosswind warning installations should be inspected regularly to ensure that signs remain visible and legible.
Maintenance checks can include:
- Cleaning the sign face
- Checking for fading
- Checking for physical damage
- Checking mounting hardware
- Removing vegetation or other obstructions
- Checking the condition of the windsock
- Checking that supplementary plates remain legible
Windsocks should also be inspected to ensure that they remain securely mounted and can move freely in response to wind.
W349 and Wind Monitoring
At sites with significant crosswind concerns, wind conditions may be monitored using appropriate local systems.
However, W349 is based on the known hazard at the location rather than displaying a real-time wind-speed measurement.
W349 and Variable Wind Conditions
Crosswinds may vary according to season, weather, time of day and local terrain.
The SARTSM specifically allows W349 to be used where severe crosswinds are known to occur even if only occasionally.
This means the warning does not require the hazard to be present continuously throughout the year.
W349 on Public Roads in South Africa
On public roads, W349 and TW349 should be selected, positioned and installed according to the applicable South African road traffic sign requirements and the requirements of the responsible road authority.
The warning arrangement should reflect the actual crosswind conditions at the site.
W349 on Private Roads and Properties
Similar crosswind warning signage may also be used on private roads and controlled properties where strong winds create a traffic-management concern.
Potential applications include:
- Mining properties
- Industrial sites
- Private estates
- Mountain resorts
- Farms
- Game reserves
- Lodges
- Large private access roads
- Construction sites
- Commercial properties in exposed areas
On private property, the warning can form part of an internal traffic-management system based on the conditions of the site.
W349 at Mining Sites
Mining properties can contain exposed haul routes, elevated roads and open sections where strong winds affect vehicle movement.
Similar crosswind warning signage can help communicate the hazard to employees, contractors and other authorised road users.
W349 at Construction Sites
Construction areas can temporarily change traffic routes and expose vehicles to different wind conditions.
Where a temporary roadworks detour passes through an area affected by severe crosswinds, TW349 may be appropriate.
W349 at Industrial Facilities
Large industrial facilities may have open access roads, elevated sections or exposed areas where strong side winds can affect vehicle movement.
Where appropriate, crosswind warning signage can form part of the site's internal traffic-management arrangements.
W349 for Commercial Properties
Commercial properties with large open parking areas, elevated access roads or exposed approaches may experience strong wind conditions.
Where crosswinds create a genuine vehicle-control concern, suitable warning signage can communicate the hazard to drivers.
W349 for Rural Properties
Rural roads and private access routes can pass through exposed terrain where strong side winds occur.
Similar W349-style warning signage may be useful where local conditions create a significant crosswind hazard.
Who May Need W349 Crosswinds Signs?
W349 and TW349 signage may be relevant to:
- Road authorities
- Municipalities
- Traffic-management contractors
- Road construction contractors
- Road maintenance contractors
- Mining operations
- Industrial facilities
- Property developers
- Private estate managers
- Farm owners and managers
- Resorts and lodges
- Commercial property managers
Benefits of W349 Crosswinds Warning Signs
- Warns drivers about severe crosswinds ahead.
- Alerts road users to the possibility of vehicle deflection.
- Provides advance information before an exposed road section.
- Can be used where severe crosswinds occur occasionally as well as regularly.
- Can be supplemented with distance information.
- Can be supported by a permanent windsock at the actual hazard location.
- TW349 provides a temporary option for suitable roadworks detours.
- Can form part of a wider road and traffic-management system.
Frequently Asked Questions About W349 Road Signs
What does W349 mean?
W349 means Crosswinds Ahead. It warns about severe crosswinds that may deflect a vehicle from its path.
What is the official name of W349?
The official South African designation is CROSSWINDS AHEAD.
What does the W349 sign warn about?
It warns about the possibility of severe crosswinds that may affect the direction or path of a vehicle.
Where is W349 normally used?
It is used in advance of road sections where severe crosswinds are known to occur, including locations where they occur only occasionally.
Are mountain roads suitable for W349?
Yes. The SARTSM notes that crosswind warning locations tend to occur in mountainous and undulating areas.
Can W349 be used on exposed roads?
Yes, where local wind conditions are known to create severe crosswinds capable of affecting vehicles.
Can W349 be used near bridges?
It may be appropriate where severe crosswinds are known to affect an exposed bridge or approach, subject to the applicable assessment and requirements.
Does W349 impose a speed limit?
No. W349 is a warning sign and does not itself establish a legal speed limit.
What should drivers do when they see W349?
Drivers should remain alert for strong side winds, reduce speed where appropriate and maintain proper control of the vehicle.
Can W349 be used for occasional crosswinds?
Yes. The SARTSM states that W349 may be used where severe crosswinds are known to occur even if they occur only occasionally.
What is TW349?
TW349 is the temporary Crosswinds warning sign.
When is TW349 used?
TW349 may be used where a roadworks detour is located in an area subject to severe crosswinds.
Can W349 be used with a windsock?
Yes. The SARTSM recommends a permanent windsock at the actual site of the crosswind hazard.
What is the purpose of a windsock?
A windsock provides a visible indication of wind direction at the actual crosswind hazard location.
Can W349 have a supplementary distance plate?
Yes. The SARTSM recommends an IN1.2 supplementary plate to indicate the distance over which severe crosswinds may be expected.
How long can the crosswind section be?
The affected distance depends on the local terrain and wind exposure. A supplementary distance plate can indicate the relevant distance where appropriate.
What colours does permanent W349 use?
The permanent sign uses a red retroreflective triangle, black semi-matt symbol and white retroreflective background.
What colours does TW349 use?
The temporary version uses a red retroreflective triangle, black semi-matt symbol and yellow retroreflective background.
Can crosswinds affect trucks?
Yes. Trucks and other high-sided vehicles may be affected by strong side winds because of their large exposed side areas.
Can crosswinds affect buses?
Yes. Buses and coaches may also be affected by strong crosswinds and should be driven according to the prevailing conditions.
Can crosswinds affect caravans?
Yes. Vehicles towing caravans can be affected by strong side winds, particularly on exposed roads.
Can crosswinds affect motorcycles?
Yes. Strong gusts can cause lateral movement and require careful vehicle control.
Can W349 be used on private property?
Similar crosswind warning signage may be used on private roads and controlled properties where strong winds create a traffic-management concern.
Can W349 be used at construction sites?
Yes. TW349 may be used where a suitable roadworks detour passes through an area subject to severe crosswinds.
Can W349 be used at mining sites?
Similar crosswind warning signage may be used on mining properties and access roads where strong winds create a relevant vehicle-control hazard.
Where should W349 be placed?
It should be displayed in advance of the section where crosswinds are likely to become dangerous, according to the applicable SARTSM requirements.
Is W349 a warning sign?
Yes. W349 is part of the W-series warning signs.
Is W349 the same as a wind warning sign?
W349 is the South African road-sign warning for severe crosswinds capable of affecting vehicle path.
Can W349 be used with other signs?
Yes. Other warning or regulatory signs may be required where additional hazards, restrictions or traffic controls apply.
Can Signs4SA supply W349 signs?
Yes. Signs4SA can assist with W349 Crosswinds Ahead signs, temporary TW349 signs, supplementary distance plates and related traffic signage.
Order W349 Crosswinds Ahead Warning Signs
Need W349 Crosswinds Ahead signs for a mountain road, exposed route, bridge approach, mining site, rural road, construction detour, private estate or industrial property?
Signs4SA can assist with permanent and temporary crosswind warning signage and supplementary traffic-sign products for different road and traffic-management applications.
Contact Signs4SA with the W349 or TW349 code, required quantity, sign size, material and installation requirements to request a quotation.
One popular type of road sign is the Crosswinds ahead sign. This type of sign is used to provide drivers with important information about the road ahead, such as directions, speed limits, and potential hazards.
Crosswinds ahead_ signs come in a variety of shapes and sizes, and are made from a range of materials, including metal, plastic, and reflective materials. They can be customized to meet the specific needs of a particular roadway or location, including the addition of logos, graphics, and text.
One important feature of Crosswinds ahead signs is their high visibility. These signs are designed to be easily seen by drivers, even from a distance and in adverse weather conditions. Many Crosswinds ahead signs are also designed with reflective materials that make them visible at night.
Another important feature of Crosswinds ahead signs is their durability. Road signs are exposed to a wide range of environmental factors, including wind, rain, and extreme temperatures. As such, they need to be made from materials that can withstand these conditions and remain in good condition for years to come.
For businesses and organizations that need to create custom road signs, working with a reputable sign company can ensure that their signs are of high quality and meet all necessary standards and regulations. Signs4sa can provide expert advice on design, materials, and installation, and can help businesses ensure that their signs are installed safely and effectively.
Overall, Crosswinds ahead signs are an important tool for ensuring road safety and providing drivers with the information they need to navigate effectively. By working with a professional sign company to create and install these signs, businesses and organizations can help ensure that their messages are seen and understood by drivers, and help to improve safety on the road.