What does a white diamond symbol on a roadway indicate?

The presence of a white diamond symbol on a roadway signifies a high-occupancy vehicle (HOV) lane. These lanes are designated for vehicles with multiple passengers, encouraging carpooling and reducing traffic congestion. HOV lanes are often marked with white diamond symbols to make it clear to drivers that special rules apply, restricting access to vehicles that do not meet the occupancy requirement.

This symbol plays an important role in traffic management, as it helps to facilitate faster travel for those vehicles that are carrying more than a single occupant, thereby promoting efficiency and environmental benefits by reducing the number of cars on the road. Understanding this symbol is crucial for drivers to follow roadway regulations and utilize HOV lanes properly when applicable.