Final answer:
A left turn against a red light is only legally permitted when turning from a one-way street onto another one-way street, after stopping and yielding to traffic and pedestrians. Safety at intersections for both vehicles and pedestrians is crucial, and traffic laws must be followed at all times.
Step-by-step explanation:
The only time you can legally take a left turn against a red light is when you are turning from a one-way street onto another one-way street, unless a sign specifically prohibits it. However, regardless of the circumstance, you must always come to a complete stop and yield to other traffic and pedestrians before making the turn. While there might be extreme emergency situations like the one described with the pregnant woman, generally, traffic laws must be followed for the safety of all road users including during times when there might be less traffic, such as at 4 AM.
Pedestrian safety and vehicle speed control are also important considerations at intersections. Traffic signals can play a significant role in managing pedestrian crossings and vehicle speeds to enhance safety for all. So, adherence to traffic signals and rules is paramount unless directed otherwise by a law enforcement officer or in accordance with local traffic laws.