When passing, which vehicles must you leave a safety clearance of at least 1.5 meters from?

Correct answer: The two-wheeled moped and the light quadricycle.

When passing pedestrians, animals, animal-drawn vehicles, mopeds, personal mobility vehicles or cyclists, you must move partly or fully into the adjacent or opposite lane and leave a safety clearance of at least 1.5 meters; if the roadway has more than one lane in each direction, you must change lanes completely. Outside built-up areas you must also reduce your speed by at least 20 km/h below the road's limit. A light quadricycle is legally a moped, so the rule covers it too. Farm vehicles are not on this list, although you must always leave enough lateral clearance.

Real Decreto 1428/2003, de 21 de noviembre, por el que se aprueba el Reglamento General de Circulación · Real Decreto Legislativo 6/2015, de 30 de octubre, por el que se aprueba el texto refundido de la Ley sobre Tráfico, Circulación de Vehículos a Motor y Seguridad Vial