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Highway Statistics 2009

Functional System Length - 2009 1/ Miles By Volume - Service Flow Ratio

March 2012
Table HM-61
Sheet 1 of 4

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RURAL

STATE VOLUME-SERVICE FLOW RATIO (V/SF)
INTERSTATE OTHER FREEWAYS & EXPRESSWAYS OTHER PRINCIPAL ARTERIAL
< 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL < 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL < 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL
Alabama 2/ - 138 298 33 45 25 539 - - - - - - - 605 1,233 251 7 7 45 2,148
Alaska 648 213 117 8 18 - 1,004 - - - - - - - 596 201 10 - - - 806
Arizona 2/ 116 617 227 9 11 1 981 - - - - - - - 565 471 111 2 - 17 1,166
Arkansas 2/ 1 137 261 11 30 9 449 - - - - - - - 1,038 834 270 23 34 35 2,234
California 8 402 416 226 151 79 1,282 - - - - - - - 631 1,514 1,032 120 169 56 3,521
Colorado 2/ 298 218 118 25 23 - 682 - - - - - - - 1,070 709 378 64 39 57 2,31
Connecticut - 11 16 11 6 0 43 - - - - - - - 16 60 70 2 8 8 164
Delaware - - - - - - - - - - - - - - 10 68 71 9 2 6 16
Dist.of Columbia - - - - - - - - - - - - - - - - - - - - -
Florida 2/ - 294 376 72 6 1 749 - - - - - - - 1,167 1,355 257 40 34 4 2,85
Georgia 25 167 381 131 7 4 715 - - - - - - - 2,065 550 20 5 1 1 2,641
Hawaii - - 1 - 5 - 6 - - - - - - - - 30 63 2 8 8 111
Idaho 233 284 4 - - - 522 - - - - - - - 691 800 157 24 25 5 1,701
Illinois 664 608 73 - - 8 1,354 - - - - - - - 1,760 530 60 - - - 2,350
Indiana 151 436 95 9 3 - 694 - - - - - - - 647 757 190 - - - 1,593
Iowa 18 342 263 3 2 0 628 - - - - - - - 2,180 1,252 45 0 - - 3,477
Kansas 2/ 330 289 24 - - - 643 - - - - - - - 1,982 1,024 60 - - - 3,066
Kentucky - 183 313 46 10 - 553 - - - - - - - 861 1,089 307 68 13 22 2,360
Louisiana 86 189 244 15 - - 534 - - - - - - - 271 623 97 1 1 - 992
Maine 138 117 38 6 - - 299 - - - - - - - 195 438 152 - 0 4 788
Maryland 21 40 32 23 39 29 184 - - - - - - - 101 144 171 9 12 8 445
Massachusetts - 32 23 18 1 17 91 - - - - - - - 47 51 52 - 17 - 166
Michigan 76 341 191 - - - 607 - - - - - - - 1,219 1,105 206 8 34 - 2,573
Minnesota 2/ 236 131 199 14 28 14 622 - - - - - - - 1,015 1,815 718 47 4 6 3,605
Mississippi 19 323 112 7 18 8 488 - - - - - - - 1,093 504 287 9 8 - 1,900
Missouri 157 331 234 - - - 722 - - - - - - - 1,284 1,215 564 2 35 33 3,134
Montana 979 151 - - - - 1,130 - - - - - - - 1,993 567 56 - 4 - 2,621
Nebraska 103 258 52 7 - - 420 - - - - - - - 2,234 447 13 - - - 2,693
Nevada 335 48 41 1 25 - 451 - - - - - - - 1,051 238 86 0 1 31 1,408
New Hampshire 2/ 34 75 32 4 3 - 148 - - - - - - - 42 136 165 10 2 3 358
New Jersey - 5 27 4 9 19 64 - - - - - - - 12 109 69 23 34 6 254
New Mexico 329 344 170 - - 1 844 - - - - - - - 1,128 524 148 - 13 28 1,841
New York 318 195 284 9 31 4 841 - - - - - - - 522 787 219 6 5 - 1,540
North Caroliqn 2/ 24 68 257 79 90 25 543 - - - - - - - 192 985 642 23 28 79 1,949
North Dakota 367 152 - - - - 519 - - - - - - - 2,715 216 1 - - - 2,932
Ohio 2/ 45 140 443 30 48 17 723 - - - - - - - 1,064 785 95 22 3 - 1,969
Oklahoma 2/ 92 432 129 30 1 - 684 - - - - - - - 1,500 647 146 24 - - 2,317
Oregon 92 267 177 5 12 - 554 - - - - - - - 1,234 1,027 443 4 33 52 2,793
Pennsylvania 2/ 1,097 - - - - - 1,097 - - - - - - - 1,932 - - - - - 1,932
Rhode Island - - 5 9 5 1 19 - - - - - - - 12 31 5 - - - 48
South Carolina 581 - - - - - 581 - - - - - - - 1,287 - - - - - 1,287
South Dakoat 2/ 602 - - - - - 602 - - - - - - - 2,533 - - - - - 2,533
Tennessee 23 164 475 - 21 6 689 - - - - - - - 785 881 179 12 7 - 1,864
Texas 2/ 695 708 536 33 44 43 2,059 - - - - - - - 3,820 2,875 747 31 3 3 7,479
Utah 257 282 153 13 19 - 725 - - - - - - - 313 501 228 1 - 18 1,061
Vermont 102 102 76 - - - 280 - - - - - - - 45 187 79 0 2 7 320
Virginia 88 218 274 49 38 - 667 - - - - - - - 814 423 104 3 - 3 1,346
Washington 7 183 232 29 16 - 467 - - - - - - - 747 925 279 22 7 - 1,980
WestVirginia 23 218 101 6 12 11 371 - - - - - - - 493 412 90 18 9 34 1,056
Wisconsni 2/ 478 - - - - - 478 - - - - - - - 3,179 - - - - - 3,179
Wyoming 531 260 25 - - - 816 - - - - - - - 1,309 498 91 27 40 23 1,989
U.S.Total 10,430 10,114 7,543 979 778 321 30,164 - - - - - - - 52,066 31,573 9,479 669 642 602 95,031
Puerto Rico - 12 21 6 2 1 42 - - - - - - - 4 33 4 - - 1 42
Grand Total 10,430 10,126 7,564 984 779 322 30,205 - - - - - - - 52,070 31,606 9,484 669 642 603 95,074

March 2012
Sheet 2 of 4
Table HM-61

RURAL

STATE VOLUME SERVICE FLOW RATIO (V/SF)
MINOR ARTERIAL MAJOR COLLECTOR
< 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL < 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL
Alabama 2/ 1,779 1,703 260 1 67 - 3,810 10,877 839 8 - 7 - 11,731
Alaska 413 10 - 2 11 - 437 1,263 136 9 - - - 1,408
Arizona 2/ 691 466 48 15 63 74 1,357 3,740 445 79 28 6 3 4,301
Arkansas 2/ 2,008 719 322 5 3 - 3,057 11,273 1,397 17 74 3 - 12,764
California 3,763 1,587 1,101 141 70 0 6,663 10,330 1,988 244 33 100 1 12,697
Colorado 2/ 2,733 489 527 3 2 - 3,754 5,218 137 80 70 - 1 5,506
Connecticut 74 143 23 5 1 2 248 667 235 46 0 2 - 950
Delaware 46 46 12 3 2 1 110 282 142 11 - 3 13 450
Dist. of Columbia - - - - - - - - - - - - - -
Florida 2/ 1,229 1,038 96 24 - 12 2,399 3,588 472 54 - 3 - 4,117
Georgia 3,588 1,438 149 10 - 4 5,189 11,808 852 80 42 27 - 12,809
Hawaii 100 127 61 - - 8 297 245 66 9 - - - 320
Idaho 1,144 225 29 3 - 19 1,420 5,422 314 83 - - - 5,819
Illinois 4,083 278 311 - 1 - 4,673 13,295 376 55 - 1 - 13,727
Indiana 1,221 840 2 - - - 2,063 8,586 1,020 370 - - 26 10,002
Iowa 3,554 354 2 - - - 3,910 14,163 150 22 - - - 14,334
Kansas 2/ 3,893 386 1 - - - 4,280 22,831 18 - - - - 22,849
Kentucky 442 661 522 - 24 60 1,708 3,971 2,010 179 49 10 - 6,219
Louisiana 807 594 90 95 - 4 1,590 3,933 608 131 6 - - 4,677
Maine 408 492 101 13 3 - 1,017 2,713 439 63 - 2 - 3,218
Maryland 217 455 160 5 - 3 841 874 539 121 1 0 - 1,534
Massachusetts 258 93 43 - - - 394 1,106 3 34 - - - 1,143
Michigan 2,932 1,932 129 - 17 - 5,010 14,855 1,664 115 - - - 16,634
Minnesota 2/ 4,843 1,585 201 9 - - 6,638 15,742 248 58 - 48 - 16,096
Mississippi 2,546 833 292 7 5 - 3,683 10,788 853 110 - 10 - 11,761
Missouri 3,073 773 141 10 - - 3,997 15,670 716 39 - - - 16,425
Montana 2,758 195 27 - - 1 2,981 6,912 78 53 15 - 3 7,060
Nebraska 3,744 394 29 2 - - 4,169 11,398 88 11 - - - 11,497
Nevada 644 48 15 6 4 20 738 1,983 66 16 - - - 2,066
New Hampshire 2/ 136 251 65 3 5 4 464 708 323 60 - - 2 1,093
New Jersey 133 114 40 25 - 2 313 563 377 27 - - - 966
New Mexico 1,345 306 249 52 1 - 1,953 3,351 449 31 - 52 - 3,883
New York 2,081 1,395 232 34 - 4 3,747 4,498 1,108 84 - - 27 5,717
North Carolina 2/ 449 893 562 218 327 149 2,598 4,443 1,897 1,023 376 76 200 8,015
North Dakota 2/ 2,449 55 12 - - - 2,516 11,502 25 - - - - 11,527
Ohio 1,647 887 123 - - - 2,657 9,391 1,806 137 - - - 11,334
Oklahoma 2/ 2,023 643 16 - 3 - 2,685 20,406 755 83 2 - - 21,246
Oregon 1,839 365 133 - - 24 2,360 7,750 442 179 - 5 - 8,375
Pennsylvania 2/ 4,546 - - - - - 4,546 7,235 - - - - - 7,235
Rhode Island 22 40 3 - - - 65 114 32 - - - - 145
South Carolina 3,289 - - - - - 3,289 10,481 - - - - - 10,481
South Dakota 3,341 - - - - - 3,341 12,415 - - - - - 12,415
Tennessee 1,091 1,633 473 4 - 0 3,200 4,042 1,027 45 - - - 5,113
Texas 2/ 6,044 3,542 421 - - 1 10,008 32,142 1,987 389 11 27 1 34,557
Utah 893 268 171 23 10 62 1,427 2,921 113 152 - - 124 3,310
Vermont 224 332 164 6 1 - 728 1,432 472 88 7 10 - 2,010
Virginia 2,233 962 205 12 - 18 3,431 8,402 717 98 49 - 2 9,268
Washington 1,294 479 76 2 - - 1,852 7,737 626 19 6 - 1 8,390
West Virginia 714 316 184 - 16 111 1,342 4,757 791 62 - 4 37 5,652
Wisconsin 2/ 4,831 - - - - - 4,831 12,480 - - - - - 12,480
Wyoming 1,053 158 21 - 5 6 1,243 2,797 101 10 - - 0 2,908
U.S. Total 94,670 30,544 7,845 738 641 590 135,027 383,099 28,945 4,584 770 397 441 418,235
Puerto Rico 109 71 28 - 22 2 232 180 50 6 6 2 - 244
Grand Total 94,779 30,615 7,873 738 663 591 135,259 383,279 28,995 4,590 776 398 441 418,479

March 2012
Sheet 3 of 4
Table HM-61

URBAN

STATE VOLUME-SERVICE FLOW RATIO (V/SF)
INTERSTATE OTHER FREEWAYS & EXPRESSWAYS OTHER PRINCIPAL ARTERIAL
< 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL < 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL < 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL
Alabama 2/ - 52 118 65 58 74 367 - 13 16 3 3 6 41 138 480 357 33 41 12 1,061
Alaska 23 30 23 1 1 0 78 - - - - - - - 5 29 24 4 2 5 69
Arizona 2/ 4 39 58 10 21 56 188 11 18 38 7 55 47 176 102 447 636 97 84 32 1,398
Arkansas 2/ - 33 80 16 40 38 207 28 26 27 15 5 - 101 97 211 198 37 49 24 616
California 2 49 180 134 393 420 1,178 59 140 448 183 385 323 1,537 546 1,810 2,942 438 448 278 6,462
Colorado 2/ 7 52 82 27 47 54 269 40 91 124 3 30 21 309 181 345 500 50 61 52 1,189
Connecticut - 15 82 63 91 52 303 8 42 85 27 57 20 240 38 230 311 48 41 17 684
Delaware 3 4 24 3 7 - 41 2 6 20 1 1 - 30 14 56 84 3 13 6 175
Dist. of Columbia - - 2 2 7 1 13 1 1 5 5 1 3 17 2 18 50 7 20 9 104
Florida 2/ 9 20 345 131 94 119 718 23 82 243 33 121 71 573 230 999 1,769 300 155 124 3,577
Georgia 0 40 240 56 77 114 527 10 43 64 9 10 11 148 574 780 461 50 35 10 1,909
Hawaii 2 8 18 7 10 4 49 - 8 17 7 2 0 34 9 62 136 8 9 3 227
Idaho 5 36 20 9 8 12 90 - - - - - - - 96 165 117 16 27 4 426
Illinois 51 210 218 122 104 109 814 39 23 9 10 11 6 99 497 1,168 1,196 154 45 40 3,100
Indiana 9 220 141 40 29 21 460 53 82 25 1 1 2 164 398 835 489 49 42 49 1,862
Iowa 2 22 74 17 27 12 153 - - - - - - - 352 300 141 9 0 - 802
Kansas 2/ 41 44 80 14 11 24 214 22 80 37 14 11 23 187 307 248 211 14 15 15 810
Kentucky - 6 76 22 46 60 209 13 21 12 3 8 10 67 64 325 335 34 19 14 792
Louisiana 44 35 159 27 52 55 371 1 26 9 4 11 0 51 137 316 331 34 130 99 1,048
Maine 13 30 23 1 1 - 68 9 6 6 - 0 - 21 11 76 45 5 4 0 141
Maryland 3 15 72 47 97 64 298 15 68 103 36 51 22 294 99 348 476 76 68 15 1,081
Massachusetts 5 56 214 50 48 108 482 9 102 118 47 36 - 312 207 578 753 106 161 43 1,847
Michigan 11 127 266 94 79 57 635 29 87 140 39 28 6 329 348 1,035 686 136 76 19 2,300
Minnesota 2/ 5 7 51 20 79 120 282 5 16 31 25 38 54 169 86 186 242 67 14 17 612
Mississippi 11 56 81 7 39 17 211 14 32 20 1 - - 67 304 325 252 37 38 66 1,022
Missouri 39 66 191 26 55 75 451 51 82 127 48 27 69 405 227 570 242 49 35 61 1,183
Montana 26 36 - - - - 62 - - - - - - - 40 98 47 1 2 - 188
Nebraska 2 17 20 7 8 7 61 3 9 14 3 2 0 32 112 182 140 20 5 8 466
Nevada 16 19 19 15 28 20 118 1 6 13 3 11 11 46 31 75 134 20 12 13 286
New Hampshire 2/ 3 13 33 9 18 - 76 - 10 26 9 10 2 57 22 74 96 13 10 4 219
New Jersey - 11 126 35 69 126 366 3 55 115 25 114 90 401 81 410 734 232 106 140 1,703
New Mexico 23 44 58 4 14 12 156 - 5 - - - - 5 247 282 81 16 46 30 701
New York 53 164 243 138 103 158 860 63 136 284 68 64 171 786 364 797 1,045 187 230 236 2,858
North Carolina 2/ 5 25 198 103 119 133 583 23 133 148 39 43 41 427 132 515 769 111 145 103 1,775
North Dakota 2/ 17 23 10 2 - - 51 - - - - - - - 66 52 43 6 1 3 169
Ohio 8 42 262 97 206 230 845 99 166 164 14 25 16 484 494 1,083 691 56 60 28 2,412
Oklahoma 2/ 15 68 73 29 29 34 248 33 68 51 22 12 6 192 370 365 243 63 4 1 1,046
Oregon 14 23 68 15 42 12 175 0 7 19 6 7 19 58 75 288 317 28 44 8 761
Pennsylvania 2/ 695 - - - - - 695 542 - - - - - 542 2,839 - - - - - 2,839
Rhode Island - 3 18 7 12 10 49 2 26 38 13 8 2 90 40 157 143 13 7 3 363
South Carolina 247 - - - - - 247 91 - - - - - 91 1,031 - - - - - 1,031
South Dakota 77 - - - - - 77 11 - - - - - 11 137 - - - - - 137
Tennessee 4 39 182 25 63 104 417 8 48 62 17 11 7 153 151 571 569 79 91 88 1,549
Texas 2/ 46 144 413 138 253 179 1,173 148 369 427 144 241 258 1,587 1,108 1,856 1,878 317 347 290 5,796
Utah 9 18 96 45 30 13 211 - 11 4 - 0 6 21 20 77 167 20 37 45 364
Vermont 6 17 17 - 1 - 40 4 12 4 0 - 1 20 12 42 33 10 3 4 103
Virginia 18 46 209 61 50 57 441 51 43 115 40 3 18 271 203 533 433 23 89 36 1,316
Washington 1 32 168 31 56 9 297 30 121 156 25 29 18 379 94 407 542 110 118 56 1,327
West Virginia 2 89 90 2 1 0 184 3 7 0 - - - 10 72 123 126 2 - 10 333
Wisconsin 2/ 265 - - - - - 265 291 - - - - - 291 1,929 - - - - - 1,929
Wyoming 41 52 5 - - - 97 3 - - - - - 3 71 66 58 6 6 5 212
U.S. Total 1,881 2,198 5,224 1,774 2,623 2,771 16,470 1,851 2,328 3,361 951 1,474 1,361 11,326 14,809 19,992 21,269 3,190 2,993 2,126 64,379
Puerto Rico 2 62 118 19 24 14 240 1 11 20 6 11 3 52 44 115 135 25 40 40 401
Grand Total 1,884 2,261 5,342 1,793 2,646 2,784 16,710 1,852 2,339 3,380 957 1,485 1,364 11,378 14,853 20,107 21,405 3,216 3,033 2,166 64,780

March 2012
Sheet 4 of 4
Table HM-61

URBAN

STATE VOLUME SERVICE FLOW RATIO (V/SF)
MINOR ARTERIAL MAJOR COLLECTOR MINOR COLLECTOR
< 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL < 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL < 0.21 0.21-0.40 0.41-0.70 0.71-0.79 0.80-0.95 > 0.95 TOTAL
Alabama 2/   1,123 732 297 24 19 8 2,203 1,232 704 134 11 22 37 2,140 - - - - - - -
Alaska 101 68 55 11   7 1 242 198 106 40 2 - 1 347 - - - - - - -
Arizona 2/ 482 585 498 77 105 60 1,807 824 420 300 10 17 69 1,640 - - - - - - -
Arkansas 2/ 526 380 215 19   8 40 1,188 804 206 56 23 9 5 1,103 - - - - - - -
California   2,396 3,464   3,360 299 652 604 10,775 4,405 3,555 2,193 432 446 292 11,324 - - - - - - -
Colorado 2/ 546 595 407 46 36 26 1,656 990 353 330 36 32 46 1,787 - - - - - - -
Connecticut 328 714 420 45 96 59 1,662 867 616 301 26 26 21 1,856 - - - - - - -
Delaware 22 96 62 5   5 2 192 180 124 55 1 5 3 368 - - - - - - -
Dist. of Columbia 18 59 44 17   8 18 164 21 62 52 - 14 8 157 - - - - - - -
Florida 2/ 492 1,345   1,586 205 176 226 4,030 2,214 2,168 1,589 220 224 397 6,812 - - - - - - -
Georgia   1,391 1,817 718 213 44 130 4,313 1,410 751 362 64 33 82 2,702 - - - - - - -
Hawaii 19 43 36 11   4 5 119 162 120 71 5 20 12 390 - - - - - - -
Idaho 233 198 119 13 12 5 581 441 96 42 1 23 0 604 - - - - - - -
Illinois   1,266 1,305   1,273 214 164 189 4,411 1,909 1,117 1,208 78 154 207 4,673 - - - - - - -
Indiana 842 1,079 685 76 115 183 2,981 731 1,097 658 55 259 364 3,164 - - - - - - -
Iowa 717 590 188 48 20 - 1,563 531 279 126 18 24 80 1,058 - - - - - - -
Kansas 2/ 564 407 288 25 25 58 1,367 801 389 210 15 19 16 1,450 - - - - - - -
Kentucky 262 323 280 63 52 26 1,006 465 321 140 26 13 12 975 - - - - - - -
Louisiana 668 556 410 72 95 92 1,893 1,181 541 328 33 72 35 2,189 - - - - - - -
Maine 54 106 60 3   7 1 232 382 110 28 1 7 1 530 - - - - - - -
Maryland 292 641 397 46   9 43 1,428 820 525 335 45 4 13 1,743 - - - - - - -
Massachusetts   1,436 1,269 697 135 118 100 3,755 1,779 678 396 18 37 4 2,912 - - - - - - -
Michigan   1,527 2,024 964 125 62 93 4,795 2,078 1,007 271 7 34 71 3,468 - - - - - - -
Minnesota 2/ 515 944 686 80 161 149 2,535 1,070 502 389 107 80 146 2,294 - - - - - - -
Mississippi 347 343 146 28 27 54 945 934 258 199 39 2 20 1,452 - - - - - - -
Missouri 957 565 268 55 38 72 1,955 1,663 331 205 15 25 27 2,266 - - - - - - -
Montana 112 77 45 3   7 - 245 170 132 13 7 3 2 326 - - - - - - -
Nebraska 311 210 166 25 13 44 768 188 162 83 5 6 32 476 - - - - - - -
Nevada 134 204 190 48 28 17 621 366 74 154 2 4 36 636 - - - - - - -
New Hampshire 2/ 110 191 137 19 14 20 491 209 107 115 22 13 37 503 - - - - - - -
New Jersey   1,093 1,093 794 43 262 200 3,484 1,212 853 423 48 132 92 2,760 - - - - - - -
New Mexico 270 236 63 17   8 16 610 1,159 200 92 17 6 26 1,500 - - - - - - -
New York   1,520 2,152   1,351 298 168 194 5,682 1,982 1,744 1,201 66 256 175 5,423 - - - - - - -
North Carolina 2/ 851 876 965 154 174 111 3,131 1,620 582 466 75 86 57 2,886 - - - - - - -
North Dakota 2/ 150 72 62 5   9 4 302 170 82 24 2 3 5 287 - - - - - - -
Ohio   1,318 1,279 963 147 120 78 3,905 2,502 1,306 669 45 46 63 4,631 - - - - - - -
Oklahoma 2/   1,119 576 354 45 32 25 2,151 629 240 88 46 31 13 1,047 - - - - - - -
Oregon 288 451 214 63 58 55 1,127 900 588 266 67 35 33 1,888 - - - - - - -
Pennsylvania 2/   3,959 - - - - - 3,959 5,333 - - - - - 5,333 - - - - - - -
Rhode Island 82 179 93 2   3 - 359 467 98 37 5 5 5 618 - - - - - - -
South Carolina   1,480 - - - - - 1,480 2,439 - - - - - 2,439 - - - - - - -
South Dakota 374 - - - - - 374 248 - - - - - 248 - - - - - - -
Tennessee 513 732 629 72 192 311 2,448 923 572 440 63 126 123 2,246 - - - - - - -
Texas 2/   2,819 2,302   1,777 326 407 510 8,141 7,057 2,586 1,640 333 418 436 12,470 - - - - - - -
Utah 313 282 196 13 23 27 854 605 190 50 14 5 23 887 - - - - - - -
Vermont 61 48 30 -   8 5 152 191 23 3 - - 1 218 - - - - - - -
Virginia 543 823 728 38 99 49 2,279 1,440 646 238 34 48 14 2,419 - - - - - - -
Washington   1,013 792 572 67 131 53 2,627 1,177 685 390 54 36 28 2,370 - - - - - - -
West Virginia 179 322 175 13 11 36 738 562 109 54 10 0 2 737 - - - - - - -
Wisconsin 2/   2,490 - - - - - 2,490 2,302 - - - - - 2,302 - - - - - - -
Wyoming 88 45 27 1   4 1 166 321 120 51 2 11 4 510 - - - - - - -
U.S. Total 38,314 33,187 23,692 3,354 3,833 4,001 106,380 62,264 27,533 16,513 2,204 2,870 3,176 114,561 - - - - - - -
Puerto Rico 307 372 218 30 32 52 1,010 780 271 99 22 27 41 1,240 - - - - - - -
Grand Total 38,620 33,558 23,910 3,383 3,865 4,053 107,390 63,044 27,805 16,613 2,226 2,896 3,217 115,801 - - - - - - -

1/ In 2001, updated capacity (service flow) calculation procedures were instituted in the HPMS data reporting process. The procedures are based on the Highway Capacity Manual 2000, published by the Transportation Research Board. For multilane facilities volume-service flow ratio is determined by dividing the peak traffic in the peak direction by the capacity. For all other facilities the ratio is determined by dividing the peak traffic by the capacity. Peak traffic is estimated as AADT *K, where K is the design hour volume (30th highest hour) as a percent of AADT. Some differences from other tables may be noted because these values are estimated from sample data and do not include samples entirely on structures.

2/ 2008 data used due to FHWA process status.

Updated: 03/29/2012

FHWA
United States Department of Transportation - Federal Highway Administration