Total time spent traveling per capita | The End of Traffic and the Future of Transport
The American Time Use Survey, starting in 2003 and for every year thereafter, tallies the amount of time Americans spend in various activities, including travel for ten different purposes as shown in Figure 1.4. For a full decade's worth of data, it draws the same sketch. The amount of time spent in travel has declined six minutes — from 74.4 minutes to 68.4 minutes per day.
From Levinson and Krizek (2015) The End of Traffic and the Future of Transport.
Figure 1.4 Source: US Bureau of Labor Statistics - American Time Use Survey (various years) http://www.bls.gov/tus/.