Study shows recent increase in US households without a vehicle
21 January 2014
A new report by Dr. Michael Sivak at the University of Michigan Transportation Research Institute (UMTRI) shows a recent increase in the proportion of US households without a vehicle.
Sivak performed two analyses on data from the American Community Survey. The first analysis examined the changes in this proportion of US households without a vehicle for the entire US from 2005 through 2012. The second analysis studied the variations in this proportion among the 30 largest US cities for 2007 (the year with the lowest overall proportion) and 2012 (the latest available year).
The main findings were:
In 2012, 9.2% of U.S. households were without a vehicle, compared to 8.7% in 2007 (the year with the lowest recent proportion).
The proportion of households without a vehicle varies greatly among the 30 largest US cities: In 2012, the maximum was 56.5% (in New York) and the minimum was 5.8% (in San Jose).
In six of the 30 cities, more than 30% of households do not have a vehicle.
From 2007 to 2012, there was an increase in the proportion of households without a vehicle in 21 of the 30 cities examined.
The 13 cities with the largest proportions all showed an increase from 2007 to 2012.
Recent studies have shown that—per person, per driver, and per household—we now have fewer light-duty vehicles, we drive each of them less, and we consume less fuel than in the past. These trends suggest that motorization in the U.S. might have reached a peak several years ago. … The recent increase in the proportion of households without a vehicle provides additional support for the hypothesis that motorization in the U.S. peaked during the previous decade.—Michael Sivak
Michael Sivak (2014) “Has Motorization in the U.S. Peaked? Part 4: Households without a Light-Duty Vehicle” (UMTRI-2014-5)
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