Why not use bus lanes or bus only roads?
Bus lanes and bus-only roads are open to illegal use by other road users for queue jumping and parking. This abuse slows bus journeys and drains resources as breaches of bus lanes need to be monitored and fines have to be issued for misuse. With its kerbs and narrow width, a guided busway is not accessible by most vehicles, virtually eliminating the abuse of the bus route. Guided busways can also be built in areas too narrow for standard bus lanes, including disused railway lines with embankments – land that could never be made into a road.
