What does a stationary amber light at the crossing indicate?

A stationary amber light at a crossing indicates that drivers should prepare to stop. It signals that the traffic control light is about to change, usually to red. This prepares road users for a potential stop, ensuring they can respond appropriately to oncoming pedestrians or vehicles. It's essential for maintaining safety at crossings, allowing time for drivers to react.

In the context of road safety, amber lights serve as a warning phase. The expectation is for drivers to reduce their speed and be ready to halt at the intersection if necessary. Understanding this can help prevent potential accidents and improve overall traffic flow.

The other options do not align with the meaning of a stationary amber light. It does not instruct drivers to proceed without caution, speed up, or turn left, as those actions would compromise safety and disregard the purpose of the amber warning.