Under what condition can you make a left turn at a red light?

Making a left turn at a red light is a unique situation that is allowed only under specific conditions. The correct scenario involves turning from a one-way street onto another one-way street, where traffic is moving in the same direction. This rule is in place to promote the smooth flow of traffic and reduce the likelihood of accidents in situations where it is safe to do so.

When you are on a one-way street, you can turn left at a red light if you are turning onto another one-way street, as long as you yield to any pedestrians and other vehicles that may be approaching or already in the intersection. This turn is legal because both streets are aligned with the direction that the vehicles are traveling, which minimizes the chances of conflicting movements.

In contrast, the other conditions mentioned do not permit a left turn on red, as they involve scenarios where the risk of collision or traffic disruption could be higher. Therefore, the specific rule about turning from one one-way street to another aligns with traffic safety regulations in Iowa.