Diamond lane

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A rider in a bicycle diamond lane.

In the United States and Canada, a diamond lane is a special lane on a street or highway that is reserved for specific types of traffic. These lanes are usually marked with white diamonds or lozenge, hence their name. Diamond lanes are generally the right-most or left-most lane on the road. They are usually implemented to provide ways through traffic congestion, for safety reasons, and to encourage environmentally friendly transportation. A diamond lane may be intended for a specific type of traffic, or for several types. The intended use of a diamond lane is marked by traffic signs. In most areas, violating the rules of a diamond lane is punishable by a fine.

Some common examples are:


The U.S. Department of Transportation's Manual on Uniform Traffic Control Devices states that diamonds indicates a lane reserved for high-occupancy vehicles. "United States Pavement Markings".

See also[edit]