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Transportation energy data book: edition 23 - Oak Ridge National ...

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8–8<br />

Due to methodology improvements in collecting trip information, the 2001 and 1995 <strong>data</strong><br />

should be compared only to the 1990 adjusted <strong>data</strong>. The original 1990 <strong>data</strong> are comparable<br />

to all previous surveys; however, comparisons should always be made with caution because of<br />

differing survey methodologies.<br />

Table 8.7<br />

Average Annual Person-Miles Traveled (PMT), Person Trips and Trip Length<br />

per Household by Selected Trip Purposes<br />

1983, 1990, 1995 NPTS and 2001 NHTS<br />

Journey-to-worka Social and<br />

All<br />

Shopping recreational purposesb Average annual PMT per household<br />

1983 4,586 (20%) 2,567 (11%) 8,964 (39%) 22,802 (100%)<br />

1990 original 5,637 (<strong>23</strong>%) 2,674 (11%) 8,567 (35%) 24,803 (100%)<br />

1990 adjusted 5,637 (19%) 3,343 (11%) 11,308 (37%) 30,316 (100%)<br />

1995 7,740 (22%) 4,659 (14%) 10,571 (31%) 34,459 (100%)<br />

2001 6,770 (18%) 5,086 (14%) 11,215 (30%) 37,498 (100%)<br />

Average annual person trips per household<br />

1983 537 (20%) 474 (18%) 728 (28%) 2,628 (100%)<br />

1990 original 539 (20%) 504 (19%) 662 (25%) 2,673 (100%)<br />

1990 adjusted 539 (17%) 630 (19%) 874 (27%) 3,262 (100%)<br />

1995 676 (18%) 775 (20%) 953 (25%) 3,828 (100%)<br />

2001 567 (15%) 742 (19%) 1,031 (27%) 3,828 (100%)<br />

Average person trip length (miles)<br />

1983 8.5 5.4 12.3 8.7<br />

1990 original 10.7 5.4 13.2 9.5<br />

1990 adjusted 10.7 5.4 13.2 9.5<br />

1995 11.6 6.1 11.3 9.1<br />

2001 12.2 7.0 11.1 10.0<br />

Source:<br />

U.S. Department of <strong>Transportation</strong>, Federal Highway Administration, Nationwide Personal <strong>Transportation</strong><br />

Study, Public Use Tapes, Washington, DC. Data for 1995 and 2001 were generated from the Internet sites<br />

www-cta.ornl.gov/npts and nhts.ornl.gov. 1990 adjusted <strong>data</strong> - <strong>Oak</strong> <strong>Ridge</strong> <strong>National</strong> Laboratory, <strong>Oak</strong> <strong>Ridge</strong>,<br />

TN, August 1998. (Additional resources: www.fhwa.dot.gov, www-cta.ornl.gov/npts)<br />

Note:<br />

Average person trip length for 1990 and 1995 is calculated using only those records with trip mileage<br />

information present. “All purposes” includes unreported trip purposes.<br />

aIt is believed that the methodology changes in the 1995 NPTS did not affect journey-to-work trips; therefore,<br />

no adjustment is necessary.<br />

bIncludes trip purposes not shown on this table.<br />

TRANSPORTATION ENERGY DATA BOOK: EDITION <strong>23</strong>—2003

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