Minibus taxis are the standard form of transport for the majority of the population who cannot afford private vehicles. Although essential, these taxis are often poorly maintained and are frequently not road-worthy. These taxis make frequent unscheduled stops to pick up passengers, which can cause accidents. With the high demand for transport by the working class of South Africa, minibus taxis are often filled over their legal passenger allowance. Minibuses are generally owned and operated in fleets.