Different methods of transportation in South Africa include roads, railways, airports, water, and pipelines for petroleum oil. The majority of people in South Africa use informal minibus taxis as their main mode of transport. BRT has been implemented in some South African cities in an attempt to provide more formalised and safer public transport services. These systems have been widely criticised due to their large capital and operating costs. A "freeway" is different from most countries as certain things are forbidden which include certain motorcycles, no hand signals, and motor tricycles. South Africa has many major ports including Cape Town, Durban, and Port Elizabeth that allow ships and other boats to pass through, some carrying passengers and some carrying petroleum tankers. Department of Transport The Department of Transport is responsible for the regulation of all transportation in South Africa, including public transport, rail transportation, civil aviation, shipping, freight, and motor vehicles. According to the department's vision statement, "Transport [is] the heartbeat of South Africa's economic growth and social development!" Roads Road network and freeways Apartheid led to the massive expansion of South Africa's road and bus systems in order to transport black workers from bantustans they had been forcibly removed from to urban areas. As a result of the severe wealth inequality under apartheid, the apartheid government heavily subsidized bus systems at the rate of $1,000 per commuter. For bantustans such as KwaNdebele, the apartheid regime provided a higher bus subsidy than their gross domestic product. The national speed limit is 60 km/h in residential areas and 120 km/h on national roads/freeways/motorways. In 2002 the country had 362,099 km of highways, 73,506 km (17%) of which was paved (including 239 km of expressways). In South Africa, the term freeway differs from most other parts of the world. A freeway is a road where certain restrictions apply. The following are forbidden from using a freeway: a vehicle drawn by an animal; a pedal cycle (such as a bicycle); a motor cycle having an engine with a cylinder capacity not exceeding 50 cm3 or that is propelled by electrical power; a motor tricycle or motor quadrucycle; pedestrians Drivers may not use hand signals on a freeway (except in emergencies) and the minimum speed on a freeway is . Drivers in the rightmost lane of multi-carriageway freeways must move to the left if a faster vehicle approaches from behind to overtake. Despite popular