Metropolitan Transportation Authority (MTA) Assistant Conductor Practice Test

The shape of a Speed Limit sign is a white rectangle. Traffic regulations, such as speed limits, are typically communicated through rectangular signs to ensure clarity and visibility for drivers. The white background is standard for regulatory signs, highlighting the importance of abiding by the indicated speed limits. This shape and color combination aids in quick recognition by motorists, which is critical for ensuring safety on the roads.

While some warning signs, such as those indicating caution or signals requiring immediate attention, do take the shape of a yellow diamond, speed limit signs specifically utilize a rectangular format to convey rules of the road effectively.