What action is considered illegal at a red traffic light?

Answer: C — Proceeding through the intersection without stopping

Proceeding through the intersection without stopping at a red traffic light is considered illegal because it violates the fundamental rules of traffic signals. Traffic lights are designed to control the flow of vehicles and ensure safety on the roads. A red light signifies that vehicles must stop completely, allowing cross traffic and pedestrians to proceed safely. Disregarding this signal not only puts the driver at risk of a collision but also endangers others who are legally crossing or moving through the intersection. Turning right after stopping and turning left onto a one-way street are generally permissible actions at a red light, provided the driver is cautious and yields to pedestrians and oncoming traffic. Waiting for a green light is the appropriate behavior when faced with a red signal, as it indicates compliance with traffic laws. Understanding these rules is crucial for maintaining safety and adhering to traffic regulations.