Fiji's larger islands have extensive bus routes that are affordable and consistent in service. There are bus stops, and in rural areas buses are often simply hailed as they approach. Buses are the principal form of public transport and passenger movement between the towns on the main islands. Buses also serve on inter-island ferries. Bus fares and routes are regulated by the  Land Transport Authority (LTA). Bus and taxi drivers hold Public Service Licenses issued by the LTA. Taxis are licensed by the LTA and operate widely all over the country. Apart from urban, town-based taxis, there are others that are licensed to serve rural or semi-rural areas.