There is not much in the way of public transport in Detroit, and the Motor City is still geared resolutely towards the car. Driving is not too challenging and parking is relatively easy to find, but rush hours should be avoided. To hire a car drivers must be 21 years old and have a valid driver's license; sometimes an International Driving Permit is also required. However, should one choose to rely on public transport, the People Mover is an elevated monorail that provides a quick and easy way to get around most of the downtown area, while DOT buses operate a meagre inner-city service and the SMART buses serve the suburbs, but service is sparse on weekends. Taxis are a convenient form of transport and can easily be found or ordered by phone.