<P> A high - occupancy vehicle lane ( also known as an HOV lane , carpool lane , diamond lane , 2 + lane , and transit lane or T2 or T3 lanes in Australia and New Zealand ) is a restricted traffic lane reserved at peak travel times or longer for the exclusive use of vehicles with a driver and one or more passengers , including carpools , vanpools , and transit buses . The normal minimum occupancy level is 2 or 3 occupants . Many jurisdictions exempt other vehicles , including motorcycles , charter buses , emergency and law enforcement vehicles , low - emission and other green vehicles , and / or single - occupancy vehicles paying a toll . HOV lanes are normally created to increase average vehicle occupancy and persons traveling with the goal of reducing traffic congestion and air pollution , although their effectiveness is questionable . </P>
<P> A high - occupancy vehicle lane ( also known as an HOV lane , carpool lane , diamond lane , 2 + lane , and transit lane or T2 or T3 lanes in Australia and New Zealand ) is a restricted traffic lane reserved at peak travel times or longer for the exclusive use of vehicles with a driver and one or more passengers , including carpools , vanpools , and transit buses . The normal minimum occupancy level is 2 or 3 occupants . Many jurisdictions exempt other vehicles , including motorcycles , charter buses , emergency and law enforcement vehicles , low - emission and other green vehicles , and / or single - occupancy vehicles paying a toll . HOV lanes are normally created to increase average vehicle occupancy and persons traveling with the goal of reducing traffic congestion and air pollution , although their effectiveness is questionable . </P>
when are you allowed to drive in the carpool lane
when are you allowed to drive in the carpool lane
normal minimum occupancy level is 2 or 3 occupants
normal minimum occupancy level is 2 or 3 occupants