Final answer:
You must wait for a green light before making a right turn when a sign says 'no right turn on red'. This rule contributes to road safety by controlling traffic flow and helping prevent accidents.
Step-by-step explanation:
When there is a sign that says 'no right turn on red', you must wait for a green light before making a right turn. This traffic rule is important for safety reasons, as it regulates traffic flow and helps prevent accidents. In the context of road safety, traffic signals play a critical role. They are installed at intersections to manage the speed of vehicles, ensure pedestrian safety, and reduce traffic accidents. A traffic signal allows pedestrians to cross intersections at appropriate times, and the presence of a signal can slow down vehicles, which might otherwise speed through without regard for the speed limit or the safety of others.