What does a red and amber traffic light signal?

A red and amber traffic light signals that drivers should prepare to stop. When this combination of lights appears, it serves as a warning that the light will soon turn red, indicating that vehicles must halt. This warning allows time for drivers to react and safely bring their vehicle to a stop before the red light activates. Understanding this signal is crucial for ensuring safety on the road, as it helps prevent accidents by giving drivers adequate notice to stop when needed.

The other options do not align with the behavior expected by this signal. Proceeding if clear, speeding up, or waiting for pedestrians does not capture the intention behind the red and amber light, which is primarily about preparing to stop for safety reasons.