May a car with a trailer travel in the high-occupancy vehicle (HOV) lane?

As a general rule, the following may travel in the BUS-HOV lane: two- or three-wheeled motorcycles, cars, buses with a maximum authorised mass exceeding 3,500 kilograms, articulated buses, and adaptable mixed-use vehicles with the number of occupants set per section. All other vehicles and vehicle combinations are prohibited from using it, including cars with trailers, cycles, and mopeds. However, the following may also use the lane even when occupied only by the driver: - Authorised vehicle types displaying the V-15 sign (reduced mobility badge). - Two- or three-wheeled motorcycles. - Buses with a maximum authorised mass exceeding 3,500 kilograms and articulated buses. - Vehicles classified as taxis according to the usage criteria in Annex II of the General Vehicle Regulations, equipped with an external light module and a valid taxi licence. - Police, fire-fighting, civil protection, rescue, and emergency medical service vehicles on emergency duty, and road infrastructure and facility maintenance teams. - Cars displaying the V-25 environmental badge sign classified in the Vehicle Register of the Autonomous Body Dirección General de Tráfico as '0 emissions'. - Cars displaying the V-25 environmental badge sign classified in the Vehicle Register of the Autonomous Body Dirección General de Tráfico as 'ECO', 'C', or 'B', only when the variable message signs at the HOV lane access points indicate this.