Which color signal means you can safely turn left for a brief time?

The yellow X signal indicates that you can safely prepare to turn left but should do so with caution. This signal typically suggests that the traffic situation is changing. It's often used at intersections to alert drivers that they need to be ready to yield to oncoming traffic or pedestrians. The yellow X signifies that while you have a brief opportunity to make the turn, you must be vigilant and prioritize safety.

In contrast, a red X signal is a clear prohibition to stop, while a green light indicates that you have the right of way but does not specify any caution needed for turning left. The flashing yellow light alerts drivers to proceed with caution, but it does not provide the same direct indication to turn as the yellow X does. Understanding the nuances of these signals helps ensure safe driving practices and compliance with traffic laws.