You may turn left at a red light if:

The ability to turn left at a red light is typically restricted to specific circumstances, and one of the most clear and recognized situations is when making a left turn from a one-way street onto another one-way street. This maneuver is permitted because both the previous and subsequent streets are aligned for a leftward progression, reducing the potential for conflicting traffic and increasing safety.

In contrast, turning left from a two-way street onto another two-way street at a red light is generally prohibited because it could lead to conflicts with oncoming traffic that may be traveling straight through the intersection. Similarly, turning left from a highway onto a local road usually involves a stoplight rather than simply a red light, and turning from a driveway into a street does not fall under the left turn regulations associated with traffic lights. Hence, the emphasis on turning from a one-way street to another one-way street highlights the importance of knowing specific traffic regulations to maintain safe driving practices.