Final answer:
The sign described in the question is a white square with no sign above the left turn signal. It indicates that there are no specific rules or regulations for making a left turn at that intersection.
Step-by-step explanation:
The sign described in your question is a white square with no sign above the left turn signal. This sign usually indicates that there are no specific rules or regulations for making a left turn at that intersection. It is important to proceed with caution and follow the general rules of the road when making a left turn at this intersection.