The integrated Translink public transport system is both highly efficient and good value. The computerised SkyTrain (light rail) has underground downtown stops as well as an elevated track. Its latest addition, the Canada Line, now connects downtown to Vancouver International Airport.The Translink system also includes buses; electric trolley buses; West Coast Express trains (weekdays only); and SeaBus passenger ferries that connect downtown to North Vancouver. The network reaches every part of the city, including the beaches and ski slopes. After midnight, the regular bus system is replaced by a limited night bus service on main routes. Fares are based on a zone system and tickets are valid for buses, the SkyTrain and SeaBus with transfers valid for 90 minutes from the time they are validated.Taxis are easy to come by at taxi stands, hotels, or by telephone, but can be difficult to hail outside of the downtown area. Vancouver's traffic and road network is fairly well-ordered, but hiring a car is not necessary in the city because the public transport is more than sufficient.