The Carpool Lane, also known as the High-Occupancy Vehicle (HOV) lane, is a designated lane on highways that is reserved for vehicles with multiple passengers. This lane aims to encourage carpooling and reduce traffic congestion by allowing cars with two or more people to travel more quickly than those in regular lanes. Typically marked with specific signs, the Carpool Lane operates during peak traffic hours. Rules regarding the number of passengers required and the times the lane is in effect can vary by location. Violating these rules may result in fines or penalties for drivers.