Tokyo's public transport system is one of the most efficient in the world and is clean and safe, combining an extensive train network, 13 underground subway lines, and a bus system. Visitors usually find the trains (JR) and subways the best way to get around, although the complexity of the underground network can be intimidating; rush hour, from 7.30am to 9am and 5pm to 7pm, should be avoided. Most stations have English signs.Because lines are owned by different companies, transfers between trains or subways usually require a transfer between different train systems, with different ticketing systems that can be confusing. Subway tickets are bought at vending machines. The bus system is more complicated for visitors as most destinations are written in Japanese only and bus drivers don't speak English.Taxis are convenient but never cheap, particularly during rush hour. Taxis can be hailed on the street, except in some central areas, where they only pick up from taxi ranks. Drivers speak little English. Driving a car in the city is not advised. Walking around the city is a delight and the best way to go sightseeing, when possible.