What color should the electric turn signals be on each side of a bus or trailer under 80" in width?

The correct answer specifies that the electric turn signals on each side of a bus or trailer under 80 inches in width should be amber to red. This choice aligns with standard regulations regarding the color of signaling devices for vehicles, ensuring visibility and clarity for other drivers on the road. Amber is typically used for turn signals to warn other motorists of a turning vehicle, while red is reserved for stop signals, thereby avoiding confusion and enhancing safety.

This standard is particularly important in urban and highway environments where clear communication of vehicle intentions is crucial. The use of amber lights effectively conveys that the vehicle is preparing to turn, prompting surrounding drivers to react accordingly.

The inclusion of red in the signaling system highlights the importance of maintaining a hierarchy in traffic signals, as red signifies stop or caution, whereas amber indicates a transition. Understanding these color codes is essential for both safe operation and compliance with traffic laws.