Single-occupant vehicle
Encyclopedia
A single-occupant vehicle (SOV) is a privately operated vehicle
Vehicle
A vehicle is a device that is designed or used to transport people or cargo. Most often vehicles are manufactured, such as bicycles, cars, motorcycles, trains, ships, boats, and aircraft....

 whose only occupant is the driver. The drivers of SOVs use their vehicles primarily for personal travel, daily commuting and for running errands. The types of vehicles include, but are not limited to sport utility vehicle
Sport utility vehicle
A sport utility vehicle is a generic marketing term for a vehicle similar to a station wagon, but built on a light-truck chassis. It is usually equipped with four-wheel drive for on- or off-road ability, and with some pretension or ability to be used as an off-road vehicle. Not all four-wheel...

s (SUVs), light-duty trucks, and any combination thereof, along with all the various van and car sizes, but would generally be taken to exclude human powered vehicles such as bicycles. This term is used by transportation engineers and planners
Transportation planning
Transportation planning is a field involved with the evaluation, assessment, design and siting of transportation facilities .-Models and Sustainability :...

. SOVs contrast with high-occupancy vehicles, (HOV) which carry many passengers.

Single-occupant vehicles are seen as inefficient in many European cities, with officials and green activists citing unnecessary traffic congestion when carpooling and public transit are viable options. Single-occupant vehicles were banned for a limited time in New York City's Holland Tunnel
Holland Tunnel
The Holland Tunnel is a highway tunnel under the Hudson River connecting the island of Manhattan in New York City with Jersey City, New Jersey at Interstate 78 on the mainland. Unusual for an American public works project, it is not named for a government official, politician, or local hero or...

 following the attacks of September 11, 2001 - SOVs were seen as possible car-bombing resources for potential terrorist attacks.
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