Bergen has an efficient bus and night bus network, though service to the city's outskirts can be erratic. A free bus service operates during the day from Monday to Saturday, looping around the city centre.However, central Bergen is easy to negotiate on foot, with plenty of attractions within walking distance. Metered taxis are plentiful and can be hailed at one of the many taxi ranks or ordered by phone, but are expensive.The city also has an extensive ferry system, which tends to be less tourist-orientated than the express catamaran service, and visitors can enjoy spectacular views of the fjords. Driving in Bergen can be somewhat confusing, and drivers must pay a toll every time they enter the city so it becomes expensive. Nevertheless, car rental agencies are available.