At what distance should drivers be prepared to stop if a red light is illuminated?

When a red light is illuminated, drivers should be prepared to stop at the intersection line. This is the point where the vehicle must halt, regardless of what is happening further back from that line. The intersection line is clearly marked and is specifically placed to ensure vehicle safety and manage traffic flow effectively. Stopping at this line allows for clear visibility for both the driver and other road users, maintaining the intended traffic order.

Stopping only at the intersection line is crucial for safety. It prevents vehicles from encroaching into the intersection, which could lead to collisions with crossing traffic or pedestrians. Additionally, stopping at the line ensures compliance with traffic signals and law enforcement, which is vital for maintaining safety on the roads. This approach also allows for smoother switches between red and green lights for the intersecting traffic, reducing the risk of accidents caused by hasty stops or starts.

The other options do not emphasize the importance of stopping at the designated intersection line and could potentially compromise safety and traffic regulations.