Traffic lights aren't just suggestions; they are the shared "logic" of the road. When everyone actually follows the signals, someone on the sidewalk can step out into the street without having to look over their shoulder every two seconds. It’s that basic level of trust that keeps the whole system from falling apart. Likewise, a driver hitting a green light shouldn't have to scan for a rogue car flying at them from the side. But that entire system of trust falls apart the second someone tries to "gun it" through a red.
The moment someone decides to "gun it" through a red light, that shared trust vanishes. Most serious accidents at intersections happen because a driver expected the path to be clear. Side-impact collisions—often called "T-bone" crashes—are the most common result of red-light jumping, and they are notoriously deadly because the sides of cars offer the least protection for passengers.