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Table A-12
Distribution of Trips by Time of Day, in Percent

(see Figure 8 in text)

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Trip start time Percent SE
Midnight-1 a.m. 0.4 0.02
1 - 2 a.m. 0.2 0.01
2 -3 a.m. 0.2 0.01
3 - 4 a.m. 0.1 0.01
4 - 5 a.m. 0.4 0.02
5 - 6 a.m. 1.0 0.03
6 - 7 a.m. 2.6 0.05
7 - 8 a.m. 6.2 0.08
8 - 9 a.m. 5.5 0.08
9 - 10 a.m. 4.9 0.07
10 - 11 a.m. 5.9 0.08
11 a.m - 12 p.m. 6.6 0.08
12 - 1 p.m. 7.4 0.08
1 - 2 p.m. 6.6 0.07
2 - 3 p.m. 7.3 0.09
3 - 4 p.m. 8.3 0.09
4 - 5 p.m. 7.8 0.08
5 - 6 p.m. 7.9 0.09
6 - 7 p.m. 6.7 0.09
7 - 8 p.m. 5.2 0.08
8 - 9 p.m. 3.9 0.07
9 - 10 p.m. 2.8 0.06
10 - 11 p.m. 1.6 0.05
11 - 12 p.m. 0.9 0.03
Total 100.0  

NOTES: More accurately the categories are Midnight to 00:59 a.m., 1 a.m. to 1:59 a.m., etc. SE = standard error.

SOURCE: The 2001 National Household Travel Survey, daily trip file, U.S. Department of Transportation.
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