Mandatory signsUnited States

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Traffic signs

Traffic rules

Mandatory signs

A mandatory sign is a traffic sign that tells drivers what they must do. Instead of prohibiting actions, these signs impose obligations such as following a specific direction, using a particular lane, or keeping a minimum speed. Their purpose is to guide traffic safely and efficiently by ensuring that all road users follow the same required behaviour in places where it is necessary for order and safety.

1. Turning left mandatory

This traffic sign indicates that turning left is mandatory at the junction ahead. Traffic must turn left and may not continue straight ahead or turn right.

2. Turning right mandatory

This traffic sign indicates that turning right is mandatory at the junction ahead. Traffic must turn right and may not continue straight ahead or turn left.

3. Pass obstacle on the left

This traffic sign indicates that traffic must pass an obstacle on the left. Keep to the left of the obstacle and follow any accompanying signs or road markings.

4. Pass obstacle on the right

This traffic sign indicates that traffic must pass an obstacle on the right. Keep to the right of the obstacle and follow any accompanying signs or road markings.

5. Driving straight ahead mandatory

This traffic sign indicates that driving straight ahead is mandatory. Traffic must continue straight ahead and may not turn left or right at the location to which the sign applies.

6. Mandatory lane for trucks

This traffic sign indicates a mandatory lane for trucks. Trucks must use the designated lane where the sign applies. Other road users may use the lane only where the applicable signs or local rules permit them to do so.

7. Start of a minimum speed

This traffic sign indicates the start of a minimum speed. Road users covered by the sign must travel at or above the indicated speed when conditions allow. Driving more slowly may still be necessary because of traffic, weather, road conditions or another safety-related reason.