The United States Virgin Islands (USVI) is the only place under United States jurisdiction where the rule of the road is to drive on the left. However, virtually all passenger vehicles are left hand drive due to imports of U.S. vehicles. Land Cars drive on the left hand side of the road, but nearly all the automobiles on the island have left-side steering columns. Due to the terrain, roads are often narrow, steep, and take with sharp turns. They tend to be poorly surfaced. Roadways The USVI have of roadways, about of public roads and of private roads. Most public roads are two-lane and are paved with asphalt or concrete. There are few shoulders. Guts (culverts) and retaining walls help prevent flooding and landslides. Private roads are often unpaved or semi-paved. Public transportation and taxis Virgin Islands Transit (VITRAN) public buses run between the main towns and areas of local interest (not tourist destinations). Bus fare is $1 or less. Privately owned "dollar ride" or "dollar run" taxi buses stop at or near many bus stops. They follow a predefined route, but do not follow a regular schedule. It is often possible to get off anywhere along their route. These buses charge a flat rate for the trip, either $1 or $2. Nearly all taxis are shared taxis, either enclosed vans or open-air "safaris", that go to destinations that are most convenient for tourists (e.g., hotels, beaches, docks, airports, sightseeing tours). They are not metered and are required by law to charge a flat fare that varies by destination. However, private taxis can be booked online to avoid delays or shared space. Air Many flights connect the islands to the U.S. mainland. Flights also operate between Saint Thomas and Saint Croix, and from both of them to other islands in the Caribbean. Airports Two international airports serve the islands: Henry E. Rohlsen International Airport (Saint Croix) Cyril E. King International Airport (Saint Thomas) There are no airports on Saint John or Water Island. Seaplane bases There are also two seaplane bases: Charlotte Amalie Harbor Seaplane Base (St. Thomas) Christiansted Harbor Seaplane Base (St. Croix) Sea Cruise ships About two million people visit the U.S. Virgin Islands by cruise ship each year. On Saint Thomas, large cruise ships dock at the West Indian Company Dock (WICO), Havensight and the Austin "Babe" Monsanto Marine Facility in Crown Bay (Subbase). Cruise ships can