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BTS Home > Programs > National Household Travel Survey > Pre and Post 9 11 Data Documentation
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Appendix B - Data Dictionary
Pre-9/11 Person

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Variable Name Variable Type Variable Length Label Question Number Value Range Code Frequency Weighted Frequency Data File
AGERANGE Char 2 HH member 18 years or older   -1 = Appropriate Skip 21,779 271,470,012 Pre-911 Person
-7 = Refused 2 26,665  
1 = Yes 333 4,322,330  
2 = No 90 1,389,162  
BORNINUS Char 2 Respondent was born in U.S. M8 -1 = Appropriate Skip 4,746 65,730,243 Pre-911 Person
-7 = Refused 4 78,274  
-8 = Don't Know 2 10,638  
-9 = Not Ascertained 17 299,998  
1 = Yes 15,936 189,085,664  
2 = No 1,499 22,003,353  
CARRODE Num 8 Number in carpool last week E18 -9 = Not Ascertained 27 428,087 Pre-911 Person
-8 = Don't Know 4 30,255  
-5 = Did Not work last week 3 46,401  
-1 = Appropriate Skip 21,429 265,853,384  
1 96 1,383,343  
2 509 7,254,401  
3 98 1,568,122  
4 24 438,886  
5 7 97,578  
6 4 67,561  
8 1 12,317  
9 1 18,628  
14 1 9,206  
CDIVMSAR Char 2 HHs by Census Division, MSA size, Rail * 11 = New England, MSA 1 million or more, rail 629 8,395,028 Pre-911 Person
12 = New England, MSA 1 million or more, no rail 176 2,164,287  
13 = New England, MSA less than 1 million 160 1,906,068  
14 = New England, not in MSA 243 2,339,669  
21 = Mid-Atlantic, MSA 1 million or more, rail 1,458 21,383,424  
22 = Mid-Atlantic, MSA 1 million or more, no rail 460 5,184,979  
23 = Mid-Atlantic, MSA less than 1 million 709 7,654,133  
24 = Mid-Atlantic, not in MSA 366 3,575,501  
31 = E North Central, MSA 1 million or more, rail 675 9,139,724  
32 = E North Central, MSA 1 million or more, no rail 1,369 15,714,011  
33 = E North Central, MSA less than 1 million 900 9,081,598  
34 = E North Central, not in MSA 1,066 10,335,446  
42 = W North Central, MSA 1 million or more, no rail 563 6,584,339  
43 = W North Central, MSA less than 1 million 479 4,835,162  
44 = W North Central, not in MSA 802 7,726,217  
51 = So Atlantic, MSA 1 million or more, rail 983 15,017,051  
52 = So Atlantic, MSA 1 million or more, no rail 959 14,410,041  
53 = So Atlantic, MSA less than 1 million 1,004 13,429,603  
54 = So Atlantic, not in MSA 842 11,137,298  
62 = E South Central, MSA 1 million or more, no rail 267 3,811,811  
63 = E South Central, MSA less than 1 million 434 6,029,448  
64 = E South Central, not in MSA 431 5,408,221  
72 = W South Central, MSA 1 million or more, no rail 855 13,666,609  
73 = W South Central, MSA less than 1 million 594 9,493,887  
74 = W South Central, not in MSA 496 6,265,062  
82 = Mountain, MSA 1 million or more, no rail 756 8,556,479  
83 = Mountain, MSA less than 1 million 440 4,084,570  
84 = Mountain, not in MSA 445 4,158,922  
91 = Pacific, MSA 1 million or more, rail 1,156 17,716,132  
92 = Pacific, MSA 1 million or more, no rail 1,481 18,222,660  
93 = Pacific, MSA less than 1 million 619 6,626,947  
94 = Pacific, not in MSA 387 3,153,841  
CENSUS_D Char 2 Household Census Division * 1 = New England 1,208 14,805,051 Pre-911 Person
2 = Middle Atlantic 2,993 37,798,038  
3 = East North Central 4,010 44,270,779  
4 = West North Central 1,844 19,145,719  
5 = South Atlantic 3,788 53,993,993  
6 = East South Central 1,132 15,249,481  
7 = West South Central 1,945 29,425,558  
8 = Mountain 1,641 16,799,971  
9 = Pacific 3,643 45,719,580  
1 = Northeast 4,201 52,603,089  
2 = Midwest 5,854 63,416,498  
3 = South 6,865 98,669,031  
4 = West 5,284 62,519,551  
CNTTDTR Num 8 Number of travel day trips for this respondent * 0 2,451 30,124,970 Pre-911 Person
1 468 6,006,466  
2 4,312 55,322,923  
3 2,116 26,954,308  
4 3,741 47,976,932  
5 2,352 29,023,312  
6 2,373 29,074,946  
7 1,460 17,550,052  
8 1,073 13,196,574  
9 674 7,837,029  
10 463 5,550,302  
11 276 3,224,550  
12 191 2,221,011  
13 95 1,216,091  
14 55 738,907  
15 45 477,748  
16 25 328,483  
17 10 117,985  
18 15 181,318  
19 2 15,270  
20 3 30,439  
22 2 12,125  
23 1 15,400  
28 1 11,025  
CNTTPTR Num 8 Sum of travel period person trips H1* 0 12,407 162,908,735 Pre-911 Person
1 6,110 72,882,810  
2 2,141 24,524,095  
3 728 8,179,353  
4 367 3,689,993  
5 151 1,574,610  
6 68 708,537  
7 42 405,117  
8 38 377,090  
9 18 157,818  
10 14 220,152  
11 4 52,026  
12 18 192,247  
13 8 61,464  
14 8 87,052  
15 10 167,544  
16 4 38,858  
17 4 56,861  
18 7 96,305  
19 7 136,761  
20 21 326,999  
21 11 129,241  
22 2 20,704  
23 4 25,919  
24 5 114,659  
25 1 14,269  
26 3 39,733  
27 2 12,165  
28 1 7,053  
CNTTPUNQ Num 8 Number of unique travel period trips H1* 0 12,407 162,908,735 Pre-911 Person
1 7,198 86,017,993  
2 1,940 21,425,079  
3 472 5,070,430  
4 124 1,203,634  
5 37 338,490  
6 15 144,693  
7 5 32,955  
8 5 57,426  
15 1 8,735  
COMMDRVR Char 2 Commercial driver E8* -1 = Appropriate Skip 12,770 156,948,848 Pre-911 Person
-7 = Refused 1 10,872  
-8 = Don't Know 4 48,475  
-9 = Not Ascertained 12 146,821  
1 = Yes 2,107 26,392,643  
2 = No 7,310 93,660,509  
CONDNIGH Char 2 Medical condition limits driving to daytime M6C -1 = Appropriate Skip 20,459 258,053,342 Pre-911 Person
-7 = Refused 3 16,567  
-8 = Don't Know 38 383,341  
-9 = Not Ascertained 54 602,946  
1 = Yes 722 7,555,750  
2 = No 928 10,596,222  
CONDPUB Char 2 Medical condition limits use of public trans M6E -1 = Appropriate Skip 20,459 258,053,342 Pre-911 Person
-7 = Refused 1 6,356  
-8 = Don't Know 44 444,261  
1 = Yes 284 3,763,843  
2 = No 1,416 14,940,368  
CONDRIDE Char 2 Medical condition results in asking for rides M6B -1 = Appropriate Skip 20,459 258,053,342 Pre-911 Person
-8 = Don't Know 4 32,100  
1 = Yes 932 10,628,509  
2 = No 809 8,494,217  
CONDRIVE Char 2 Medical condition requires giving up driving M6D -1 = Appropriate Skip 20,459 258,053,342 Pre-911 Person
-7 = Refused 1 5,768  
-8 = Don't Know 22 238,257  
-9 = Not Ascertained 149 1,747,071  
1 = Yes 371 4,281,662  
2 = No 1,202 12,882,068  
CONDSPEC Char 2 Medical condition requires special transport M6F -1 = Appropriate Skip 20,459 258,053,342 Pre-911 Person
-8 = Don't Know 6 78,109  
-9 = Not Ascertained 222 2,982,161  
1 = Yes 153 1,939,597  
2 = No 1,364 14,154,960  
CONDTRAV Char 2 Medical condition results in less travel M6A -1 = Appropriate Skip 20,459 258,053,342 Pre-911 Person
-7 = Refused 2 27,789  
-8 = Don't Know 1 11,730  
1 = Yes 1,456 16,309,338  
2 = No 286 2,805,970  
DIARYCMP Char 2 Was diary completed G2* -8 = Don't Know 18 248,665 Pre-911 Person
-9 = Not Ascertained 42 719,312  
1 = Yes 16,135 196,080,564  
2 = No 6,009 80,159,628  
DIFFDATE Num 8 Days between travel day and person interview * 1 11,301 135,002,860 Pre-911 Person
2 3,827 47,985,838  
3 2,274 29,165,610  
4 1,725 23,607,321  
5 1,492 20,640,682  
6 1,439 19,144,929  
7 109 1,226,080  
8 21 263,027  
9 4 21,692  
10 12 150,130  
DISTBLOC Num 8 Distance to work if reported in blocks E14* -9 = Not Ascertained 8,123 90,398,207 Pre-911 Person
-1 = Appropriate Skip 13,636 181,315,961  
1 203 2,487,127  
2 44 580,773  
3 39 397,691  
4 28 348,870  
5 26 304,155  
6 26 320,952  
7 13 182,945  
8 20 257,740  
9 9 130,043  
10 11 133,796  
11 1 10,049  
12 4 73,479  
13 4 35,596  
14 1 9,364  
15 7 94,917  
17 1 10,209  
19 1 15,532  
20 1 8,760  
21 1 6,957  
25 1 8,248  
35 1 10,868  
40 1 23,240  
48 1 11,766  
70 1 30,921  
DISTTOWK Num 8 Distance to work in miles E14* -9 = Not Ascertained 8,125 90,441,319 Pre-911 Person
-1 = Appropriate Skip 4,747 65,747,823  
0.1 157 1,743,546  
0.11111111111111 46 743,582  
0.22222222222222 44 580,773  
0.25 191 2,154,614  
0.33333333333333 39 397,691  
0.44444444444444 28 348,870  
0.55555555555555 26 304,155  
0.66666666666666 26 320,952  
0.77777777777777 13 182,945  
0.88888888888888 20 257,740  
1 448 5,549,933  
1.11111111111111 11 133,796  
1.22222222222222 1 10,049  
1.33333333333333 4 73,479  
1.44444444444444 4 35,596  
1.55555555555555 1 9,364  
1.66666666666666 7 94,917  
1.88888888888888 1 10,209  
2 623 8,247,298  
2.11111111111111 1 15,532  
2.22222222222222 1 8,760  
2.33333333333333 1 6,957  
2.77777777777777 1 8,248  
3 624 7,972,925  
3.88888888888888 1 10,868  
4 451 5,972,771  
4.44444444444444 1 23,240  
5 549 7,650,648  
5.33333333333333 1 11,766  
6 469 5,996,464  
7 453 5,760,242  
7.77777777777777 1 30,921  
8 418 5,457,726  
9 201 2,564,750  
10 493 6,983,498  
11 197 2,348,409  
12 402 5,260,439  
13 207 2,822,845  
14 150 1,865,451  
15 455 6,158,492  
16 120 1,350,080  
17 134 1,577,004  
18 184 2,163,976  
19 77 921,284  
20 303 4,008,871  
21 80 883,427  
22 137 1,884,370  
23 92 1,194,080  
24 61 861,640  
25 233 3,321,542  
26 61 815,746  
27 49 600,420  
28 45 515,058  
29 23 342,949  
30 181 2,464,676  
31 27 361,592  
32 58 670,092  
33 28 301,549  
34 20 240,633  
35 113 1,472,719  
36 29 334,894  
37 27 399,613  
38 20 239,985  
39 10 116,979  
40 69 997,080  
41 13 152,567  
42 19 236,345  
43 15 180,839  
44 8 124,448  
45 48 532,887  
46 6 66,337  
47 12 133,883  
48 14 194,413  
49 2 37,103  
50 43 645,697  
51 5 72,530  
52 11 112,729  
53 9 77,018  
54 7 77,074  
55 12 145,615  
56 2 14,448  
57 5 27,681  
58 5 60,274  
59 3 35,706  
60 24 257,271  
61 1 8,517  
62 5 53,262  
63 4 74,948  
64 3 48,066  
65 21 298,122  
66 1 6,442  
67 7 107,160  
68 2 20,053  
69 1 13,233  
70 4 58,050  
71 1 10,580  
72 4 37,101  
73 2 26,760  
75 9 128,438  
76 2 28,798  
78 2 18,222  
80 3 51,669  
82 3 27,142  
84 1 5,298  
85 4 81,654  
87 1 8,889  
90 5 55,390  
93 1 9,340  
95 2 33,630  
96 1 13,410  
100 4 53,640  
104 1 5,448  
105