Those are High Occupancy Vehicle (HOV) lanes. To some, they may be known as carpool lanes. To those who've been caught driving by themselves in those lanes, they may be known as "high dollar" lanes.
reserved lanes
They are called diamond lanes because they are marked with big white diamond shapes on the pavement. These lanes are for a special kind of traffic, typically cyclists.
HOV lanes are indicated by diamonds on pavement and on road signs; sometimes the lanes are called "diamond lanes."
Rserved Lanes
Vehicles with two or more occupants
Text can be used with a diamond symbol to delineate
diamond is mainly known for its hardness.
A diamond symbol painted on a lane indicates a car pool lane. It is usually not legal to drive in these lanes unless you are part of a car pool.
The Diamond Lane is the carpool lane in California. The cars that are allowed in these lanes are White Clean Air and Green Clean Air vehicle sticker cars.
Carbonado is also known as black diamond.
Diamond.
Diamond is the hardest mineral known.