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One-Way Roadway Left Road Sign – R4

The One-Way Roadway (Left) road sign, part of the R4 One-Way Roadway regulatory sign family in the South African Road Traffic Signs Manual (SARTSM), is used to indicate that traffic on the designated roadway is permitted to travel in one direction. The arrow on the sign indicates the direction of travel towards the left.

One-way roadway signs help drivers understand the intended direction of traffic and can help prevent vehicles from travelling against the designated traffic flow. They are particularly useful where the direction of travel is not immediately obvious from the road layout.

What Does a One-Way Roadway (Left) Sign Mean?

A One-Way Roadway (Left) sign indicates that the roadway is operating as a one-way route in the direction shown by the arrow. Drivers entering or travelling along the designated roadway must follow the indicated direction of traffic.

The sign should be considered together with road markings, lane arrows, intersection controls and other traffic signs provided at the location. Drivers should not use a one-way roadway in the opposite direction unless a specific traffic-control arrangement permits it.

Where Are One-Way Roadway Signs Used?

One-way roadway signs can be used at suitable public and private traffic routes where vehicle movement needs to be controlled in a single direction. Applications can include:

• One-way streets and roads
• Urban traffic routes
• Junctions and controlled entrances
• Shopping centres
• Parking areas and parking garages
• Business parks
• Residential estates
• Industrial properties
• Warehouse and logistics facilities
• Private access roads
• Large commercial developments
• Temporary traffic routes where a one-way arrangement has been established

Why Are One-Way Roadway Signs Important?

A one-way traffic arrangement controls the direction in which vehicles use a particular roadway. Clear signage helps drivers understand the permitted direction before entering the route.

This can be particularly important at intersections, parking facilities, developments and other locations where the road layout alone may not make the intended traffic direction obvious.

The South African Road Traffic Signs Manual classifies the R4 One-Way Roadway sign as a regulatory sign and identifies one-way roadway signs as rectangular regulatory signs.

One-Way Roadway Signs at Intersections

One-way signs can be used at or near intersections to communicate the permitted direction of travel along a one-way roadway.

At a junction, the sign should be positioned so that approaching drivers can understand which roadway is one-way and which direction traffic is required to follow. Other regulatory, warning and directional signs may also be required depending on the junction layout.

One-Way Roadway Signs in Parking Areas

One-way traffic systems are commonly used in parking facilities to organise vehicle movement between entrances, parking bays and exits.

A One-Way Roadway sign can help drivers follow the intended route through a parking area, particularly where narrow lanes, multiple entrances and exits or one-direction circulation are used.

Additional directional arrows, parking signs, lane markings and other traffic-control signs can be used where required by the layout.

One-Way Roadway Signs on Private Property

One-way traffic signage can also be used on suitable private roads and internal access routes. Common applications include:

• Shopping centres
• Office parks
• Residential estates
• Factories
• Warehouses
• Hotels and resorts
• Hospitals and healthcare facilities
• Private parking facilities
• Commercial developments

For private-property installations, the sign should form part of an appropriate traffic-management arrangement that considers vehicle movement, pedestrian routes, entrances, exits and emergency access.

One-Way Roadway Signs and No Entry Signs

A One-Way Roadway sign and a No Entry sign communicate different traffic-control instructions.

The R4 One-Way Roadway sign indicates the permitted direction of travel on a one-way roadway. The R3 No Entry sign prohibits vehicular entry from the direction where it is displayed.

Depending on the road layout, both types of signs may be used to make a one-way traffic arrangement clearer. The appropriate combination should be determined according to the specific traffic-control requirements of the site.

Sign Placement and Visibility

A One-Way Roadway sign should be positioned where drivers can see and understand the direction of travel before they need to make a decision about entering or continuing along the roadway.

The sign should remain clearly visible and should not be unnecessarily obstructed by vegetation, buildings, parked vehicles, advertising structures or other objects.

Where a one-way system changes the normal movement of traffic, additional directional signs and road markings may be required to make the route easier for drivers to understand.

Temporary One-Way Traffic Arrangements

One-way traffic arrangements can also be introduced temporarily during roadworks, construction, maintenance, events or other changes to normal traffic flow.

Where a temporary one-way route is established, signage should clearly communicate the permitted direction and should be supported by appropriate temporary traffic-control and directional measures.

For public-road work, temporary traffic arrangements should comply with the applicable requirements of the responsible road or traffic authority.

One-Way Roadway Signs in South Africa

The R4 One-Way Roadway sign is recognised as a regulatory traffic sign in the South African Road Traffic Signs Manual. One-way roadway signs are rectangular and are used to communicate the direction of traffic on a roadway operating in one direction.

For public roads, the appropriate sign specification, positioning and installation requirements should be confirmed with the responsible road or traffic authority. Private-property owners and managers should consider the site's traffic-management requirements when introducing one-way traffic routes.

One-Way Roadway (Left) Sign FAQs

What does a One-Way Roadway (Left) sign mean?

It indicates that the designated roadway operates as a one-way route and that traffic must follow the direction shown by the left-pointing arrow.

What is the South African road-sign code for a One-Way Roadway sign?

The South African regulatory sign code is R4 for the One-Way Roadway sign family.

Where are One-Way Roadway signs normally installed?

They can be installed at or near the beginning of a one-way roadway, at entrances to one-way routes and at other locations where drivers need clear information about the permitted direction of travel.

Can One-Way Roadway signs be used in parking areas?

Yes. They can be used to organise vehicle movement through parking areas, parking garages and internal access routes where traffic is intended to move in one direction.

Can this sign be used on private property?

Yes. One-way signs can be used on suitable private roads and internal traffic routes at shopping centres, business parks, residential estates, industrial properties and other developments.

Does a One-Way Roadway sign mean vehicles can travel in either direction?

No. A one-way roadway arrangement indicates that traffic is intended to travel in the designated direction. Drivers should follow the sign, road markings and other traffic-control instructions.

What is the difference between a One-Way Roadway sign and a No Entry sign?

A One-Way Roadway sign indicates the permitted direction of travel, while an R3 No Entry sign prohibits vehicles from entering from a particular direction.

Can a One-Way Roadway sign be used temporarily?

Yes. Temporary one-way traffic arrangements can be introduced during construction, maintenance, events or changes to normal traffic flow, provided the signage forms part of an appropriate temporary traffic-management arrangement.

Does Signs4SA supply One-Way Roadway signs?

Signs4SA can assist with one-way, directional and other traffic-control signs for commercial, industrial, residential, parking and private-property applications. Contact us with your required specification, size and installation requirements for a quotation.

Request a Quote for R4 One-Way Roadway Signs

The R4 One-Way Roadway sign provides drivers with clear information about the permitted direction of travel and can help organise vehicle movement on public roads, parking areas, commercial developments and private access routes.

Correct sign selection, positioning and visibility are important so that drivers can understand the intended traffic direction before entering or continuing along the one-way roadway.

Contact Signs4SA to discuss your R4 One-Way Roadway (Left) sign requirements, provide your specifications and request a quotation.

One-way roadway (left) signs come in a variety of styles and formats, including danger signs, warning signs, and caution signs. Danger signs are used to indicate an immediate threat that could cause serious injury or death, such as high voltage areas or hazardous materials. Warning signs are used to indicate potential hazards that could cause injury, such as slippery floors or falling objects. Caution signs are used to indicate potential hazards that could cause minor injury, such as low ceilings or uneven surfaces. Another type of safety sign is the One-way roadway (left) sign, which is used to provide guidance on safe behavior. These signs can include instructions on how to use equipment or machinery safely, as well as reminders to wear personal protective equipment (PPE) or follow specific safety protocols. One-way roadway (left) signs can also be used to ensure compliance with safety regulations. For example, fire safety signs are required by law in most public buildings and workplaces. These signs indicate the location of fire exits, fire extinguishers, and other fire safety equipment.

More About One-way roadway (left)

Safety signs are an essential part of any workplace or public space. They are used to warn people of potential hazards, provide guidance on safe behavior, and ensure compliance with safety regulations. One type of safety sign is the One-way roadway (left) sign, which is designed to alert people to potential dangers in a particular area. One-way roadway (left) signs come in a variety of styles and formats, including danger signs, warning signs, and caution signs. Danger signs are used to indicate an immediate threat that could cause serious injury or death, such as high voltage areas or hazardous materials. Warning signs are used to indicate potential hazards that could cause injury, such as slippery floors or falling objects. Caution signs are used to indicate potential hazards that could cause minor injury, such as low ceilings or uneven surfaces. Another type of safety sign is the One-way roadway (left) sign, which is used to provide guidance on safe behavior. These signs can include instructions on how to use equipment or machinery safely, as well as reminders to wear personal protective equipment (PPE) or follow specific safety protocols. One-way roadway (left) signs can also be used to ensure compliance with safety regulations. For example, fire safety signs are required by law in most public buildings and workplaces. These signs indicate the location of fire exits, fire extinguishers, and other fire safety equipment. In addition to these types of safety signs, there are also specialized signs available for specific industries or hazards. For example, construction sites may use signs to indicate the location of underground utilities or to warn of falling debris. Healthcare facilities may use signs to remind employees to wash their hands or to indicate the location of first aid supplies. When selecting safety signs, it is important to choose signs that are appropriate for the specific hazard or situation. Signs should be placed in prominent locations where they are easily visible, and should be made from durable materials that can withstand harsh environmental conditions. By using safety signs effectively, businesses and organizations can help protect their employees, customers, and visitors from harm.

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