It is against the law to make a left turn on a red light except under which circumstance?

Making a left turn on a red light is generally prohibited, as red lights typically signal drivers to stop. However, there is an exception to this rule when turning from one one-way street to another. This specific scenario is allowed because both streets must be moving in the same direction, thus minimizing the inherent risks associated with turning against traffic.

In contrast, the other scenarios depicted by the incorrect options do not provide valid reasons for making a left turn on red. Making a left turn at any intersection without the specified conditions could result in unsafe situations with oncoming traffic or pedestrians. Similarly, turning while merely signaling does not change the traffic laws; proper signaling is always required, but it does not permit otherwise illegal maneuvers. Finally, turning during a green light is simply the standard action afforded to drivers under normal traffic conditions and is not an exception to the left turn on red rule.