Households with no vehicle available, explained

What it measures

The no-vehicle share is the percentage of occupied housing units that have no vehicles available for use by household members. "Vehicle" includes cars, trucks, and vans of one-ton capacity or less; motorcycles and recreational vehicles are excluded. The metric counts vehicles actually available, a leased company car driven home by a household member counts as available; a junked car in the driveway does not.

This is one of the cleanest indicators of urban density and transit-dependence at the household level. Households without a vehicle are typically concentrated in dense urban cores where transit is viable, in low-income areas where car ownership is unaffordable, and in retirement and assisted-living communities.

Why it matters

Vehicle availability is a key determinant of transportation equity, households without a car face significant constraints in accessing jobs, healthcare, groceries, and services in most US metros. The metric drives federal Department of Transportation environmental justice analysis, FTA transit-funding formulas, and a long list of local-government planning processes. Cities with no-vehicle shares above 30% have a transportation system that cannot rely on universal car access for service delivery.

How the Census measures it

ACS Table B08201, Household Size by Vehicles Available. The Census asks each household how many vehicles are available; the no-vehicle share is households reporting zero vehicles divided by total occupied housing units.

How to read the numbers

The US no-vehicle share is about 8%. NYC is the obvious outlier, Manhattan exceeds 70% no-vehicle, and the city overall is about 45%. Other major-transit cities (Washington DC, San Francisco, Boston, Philadelphia, Chicago) cluster in the 15-25% range. The lowest rates are in suburban and rural areas where car ownership is effectively required. A city no-vehicle share above 20% indicates a meaningful transit-dependent population; above 40% indicates a fundamentally non-auto urban character.

Caveats and limitations

The metric counts households, not individuals, a 4-person household sharing one car counts as "has vehicle." It also doesn't capture access to ride-share, taxis, or car-sharing services, which have changed the practical accessibility of car-free living in many cities. Compare against the transit share and walking share to interpret.