Taxis are plentiful in Accra and can be hailed directly from the street. They're unmetered, so travellers should be prepared to negotiate the fare before getting into the vehicle; taxi drivers are notorious for trying to overcharge foreigners. Shared minibus taxis (tro tros) travel along set routes around the city. They're the cheapest and most popular means of getting around Accra, but not always the safest due to poorly maintained vehicles and erratic driving habits. Tro tro drivers will usually have an assistant who will yell out the destination as the tro tro approaches a stop. Car hire is available at the airport, and it's possible to hire a vehicle with a driver, which is often the best way of travelling around the city.