A High-Occupancy Vehicle (HOV) is a type of vehicle that carries multiple passengers, typically two or more. HOVs are often used to promote carpooling and reduce traffic congestion. Many cities have designated HOV lanes on highways, allowing these vehicles to travel faster than single-occupancy cars. HOV lanes are designed to encourage more people to share rides, which can lead to lower emissions and less road wear. Regulations for HOV lanes vary by location, and some may require a minimum number of passengers or specific vehicle types, such as electric vehicles or buses.