Under what condition is a left turn on a red light permitted at an intersection?

A left turn on a red light is permitted under specific circumstances, one of which is when turning from two one-way streets. This situation allows drivers to make a left turn on red, provided there are no posted signs prohibiting it. This rule is designed to facilitate traffic flow at intersections where conditions allow for safe maneuvers, such as when drivers can clearly see that the way is clear for turning.

Other scenarios, such as a yellow light, do not provide the same allowance for left turns, as yellow typically means caution and not a permissive action like turning on red. Likewise, the time of day or the presence of other traffic does not affect the legality of a left turn on red from one-way streets, reinforcing the specific condition that defines when this action is acceptable.