system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it that in many states, an accident that occurs while turning left is automatically the fault of the driver turning left?
gpt
The person turning left is the only one with enough information to determine whether a left turn is safe.  At a 4 way stop, there are potential collisions from the right, the front (oncoming) and the left.  The other drivers, if going straight or right, have no way to collide with the left turner unless the left turner enters the intersection.  The left turner is the only party who knows when the left turner will enter the intersection.  This information completely determines whether there will be a collision.  Since the left turner is the only one with this information, it is the left turner responsibility to choose to enter the intersection at a safe time.  If there is a collision, the only person who 100% had the ability to avoid the crash was the left turner.

Scenarios at other intersections are similar, so you end up with a general rule about left turns.