|Travel per person|
|Daily person trips||4.3||3.7||3.8|
|Travel per driver|
|Daily vehicle trips||3.6||3.4||3.0|
|Daily vehicle-miles of travel||32.1||32.7||29.0|
|Length in miles||11.6||12.1||11.8|
|Travel time in minutes||20.7||23.3||23.9|
|Percent of trips by mode|
aIncludes local transit bus, commuter bus, school bus, charter/tour bus, city-to-city bus. bIncludes subway/elevated rail, street car/trolley, Amtrak/intercity train, and commuter train. cIncludes ferry, hotel/airport shuttle, light electric vehicle, limousine, passenger line/ferry, sailboat/motorboat/yacht, ship/cruise, special transit, taxicab, other, and unknown.
Note: Percents may not add to 100 due to rounding.
Source: U.S. Department of Transportation, Federal Highway Administration, 2009 National Household Travel Survey, available at nhts.ornl.gov as of September 2015.