For short distances, the tuk-tuk is Vientiane's primary mode of transport. These privately owned, three-wheeled motor vehicles carry passengers in and around the city, charging flat rates for different destinations. Taxis tend to gather at busy locations, such as markets and bus terminals.The Talat Sao Bus Station is Vientiane's main terminal and offers routes to neighbouring cities and Thailand. Buses can be badly maintained and lack air-conditioning. They are, however, a major source of transportation for locals.Bicycle and scooter rentals are available from private businesses and some guesthouses. It is illegal to ride a scooter without a helmet and fines are known to be costly. Transport in rural areas may be difficult to find or unreliable, meaning tourist might simplify their plans by hiring a car for longer distances.