Norwich city centre is fairly compact and can be explored easily on foot. It is also a very cycle-friendly city with most major streets having separate bike lanes and also several cycle tracks along the two rivers. City buses are mostly operated by FirstGroup and are handy for reaching the train station and riverside entertainment district, the university and the airport. Fares change regularly but expect to pay around £2.30 for a single-trip adult ticket. Return tickets and day pass tickets are also available - buy tickets from the driver change available or from the ticket machines located at the bus stops. Metered taxis are fairly cheap by British standards and are of the purpose-built 'black cab' variety as in London, whilst telephone-booked minicabs are cheaper for longer trips.