Final answer:
It is illegal to enter an intersection on a green light if the intersection is blocked, to avoid obstructing cross traffic and ensure pedestrian safety. Traffic signals help regulate traffic flow and can reduce accidents.
Step-by-step explanation:
Even with a green light, it is illegal to go through an intersection if the intersection is obstructed or if traffic is so backed up that you cannot get completely through the intersection. The traffic laws require that you ensure the exit from the intersection is clear before entering, even on a green light, to avoid being caught in the middle of the intersection and potentially blocking cross traffic when the light changes. This rule is crucial for maintaining traffic flow and ensuring safety for all road users, including pedestrians who might need to cross. Additionally, installing traffic signals could potentially reduce the number of accidents and improve pedestrian safety by regulating the flow of traffic more effectively.