More than 80 per cent of Melbourne's bus services are wheelchair-accessible on weekdays. Most bus services are wheelchair-accessible on the weekend and public holidays, except bus routes 453, 455, 457, 458 and 459, which operate in the Melton area and bus routes 431, 432 and 404, which operate in the Footscray / Yarraville area. Some bus routes are fully wheelchair-accessible and others are partly wheelchair-accessible. At the stop, the bus driver places a ramp between the front door of the bus to the kerb of the road. SmartBus vehicles are able to 'meet' the bus stop at the kerb and eliminate a 'step' to board the bus. SmartBus stops have tactile ground surfaces in bright colours that are used to to help people with vision impairments.