When is it legal to turn left on a red light?

It is legal to turn left on a red light when you are turning from a one-way street onto another one-way street. This is a specific exception to the general rule against turning left on red. The reason it’s permissible is that both streets are oriented in the same direction, allowing for a safe and controlled turn without conflicting with oncoming traffic.

In most other scenarios, turns on red are primarily allowed when turning right, and for left turns, specific conditions must be met, such as the one-way to one-way situation. This helps maintain traffic flow and safety by ensuring that vehicles do not inadvertently move into oncoming lanes.