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Highway Statistics 2008

Functional System Length - 2008 1/ Miles By Volume - Service Flow Ratio

October 2009
Table HM-61
Sheet 1 of 4

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Rural

STATE VOLUME-SERVICE FLOW RATIO (V/SF)
INTERSTATE 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
Alabama - 110 291 68 62 12 543 507 1,274 319 8 8 35 2,151
Alaska 629 225 118 4 34 3 1,013 598 205 3 - - - 806
Arizona 63 604 281 24 7 1 980 399 498 266 2 - 1 1,166
Arkansas - 123 281 38 6 12 460 970 876 269 5 112 2 2,234
California 13 302 484 129 263 90 1,281 652 1,427 987 194 129 124 3,513
Colorado 198 353 105 8 21 - 685 1,110 810 271 53 34 40 2,318
Connecticut - 9 21 8 5 - 43 17 58 68 4 14 3 164
Delaware - - - - - - - 3 61 77 4 20 1 166
Dist. of Columbia - - - - - - - - - - - - - -
Florida - 278 451 11 9 - 749 1,021 1,453 295 47 15 22 2,853
Georgia 10 178 273 141 89 24 715 1,628 849 129 3 7 5 2,621
Hawaii - - - 6 - - 6 - 55 38 10 9 - 112
Idaho 240 282 - - - - 522 988 640 63 14 6 9 1,720
Illinois 411 741 187 - 8 10 1,357 1,804 476 58 - - - 2,338
Indiana 2/ 94 491 91 14 17 - 707 624 959 144 1 - 1 1,729
Iowa 31 312 228 49 6 1 627 2,158 1,252 54 - - - 3,464
Kansas 312 300 31 - - - 643 2,174 841 50 - - - 3,065
Kentucky - 163 352 26 12 - 553 850 1,021 345 77 39 9 2,341
Louisiana 24 195 243 7 7 - 476 267 556 168 2 - - 993
Maine 137 116 40 6 - - 299 174 461 147 - - 5 787
Maryland 37 32 55 11 27 22 184 105 124 179 5 13 17 443
Massachusetts 7 26 31 9 1 17 91 49 45 52 - 20 - 166
Michigan 63 303 168 74 - - 608 986 1,277 282 6 12 22 2,585
Minnesota 3/ 199 104 228 42 27 61 661 1,008 2,039 575 14 49 10 3,695
Mississippi 33 336 68 14 34 7 492 999 568 304 - - 12 1,883
Missouri 80 300 332 9 1 - 722 950 1,626 462 44 16 23 3,121
Montana 912 218 - - - - 1,130 1,910 644 63 5 - - 2,622
Nebraska 81 222 112 6 - - 421 2,192 481 21 - - - 2,694
Nevada 346 54 25 - 1 25 451 977 228 160 9 2 35 1,411
New Hampshire 21 98 23 3 - 6 151 41 140 167 7 2 4 361
New Jersey - 7 23 5 17 13 65 23 88 68 19 52 3 253
New Mexico 332 338 171 2 - 1 844 1,247 485 78 3 - 28 1,841
New York 303 189 245 64 5 29 835 586 655 234 54 5 9 1,543
North Carolina 25 12 263 79 120 42 541 154 929 728 40 43 68 1,962
North Dakota 397 123 - - - - 520 2,808 123 - - - - 2,931
Ohio 42 140 428 33 63 17 723 1,048 794 100 24 3 - 1,969
Oklahoma 63 414 156 28 20 2 683 1,469 779 68 2 - - 2,318
Oregon 75 261 200 4 11 4 555 1,210 988 501 11 33 39 2,782
Pennsylvania 42 516 405 50 55 3 1,071 680 892 375 14 2 - 1,963
Rhode Island - - - 5 13 1 19 14 29 5 - - - 48
South Carolina 578 - - - - - 578 1,281 - - - - - 1,281
South Dakota 603 - - - - - 603 2,533 - - - - - 2,533
Tennessee 28 103 364 126 52 14 687 723 876 248 11 14 - 1,872
Texas 688 757 602 20 77 36 2,180 3,185 2,846 836 51 30 73 7,021
Utah 309 254 154 8 - - 725 227 490 194 6 2 66 985
Vermont 92 117 70 - - 1 280 32 187 89 3 1 7 319
Virginia 51 212 363 23 17 - 666 783 488 127 2 - 8 1,408
Washington 3 190 214 44 17 - 468 731 863 350 3 33 - 1,980
West Virginia 20 152 113 22 18 50 375 518 409 51 4 22 46 1,050
Wisconsin 478 - - - - - 478 3,185 - - - - - 3,185
Wyoming 493 305 19 - - - 817 1,464 390 88 5 32 10 1,989
U.S. Total 8,563 10,565 8,309 1,220 1,122 504 30,283 49,062 33,255 10,156 766 779 737 94,755
Puerto Rico - 6 23 - - 1 30 4 34 13 - 1 - 52
Grand Total 8,563 10,571 8,332 1,220 1,122 505 30,313 49,066 33,289 10,169 766 780 737 94,807

October 2009
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 1,921 1,711 170 - 13 1 3,816 10,861 849 10 2 7 - 11,729
Alaska 412 11 19 2 - - 444 1,248 150 37 - 1 - 1,436
Arizona 695 397 169 13 10 74 1,358 3,360 780 129 11 5 16 4,301
Arkansas 1,897 788 263 1 4 - 2,953 11,024 1,415 18 4 53 - 12,514
California 3,567 1,660 1,158 134 41 53 6,613 10,323 1,872 424 3 39 6 12,667
Colorado 2,764 605 187 61 107 34 3,758 5,353 61 80 - - - 5,494
Connecticut 71 141 29 4 1 3 249 699 224 25 - 2 - 950
Delaware 38 42 18 1 1 3 103 331 102 21 - 3 1 458
Dist. of Columbia - - - - - - - - - - - - - -
Florida 1,347 856 152 - 33 11 2,399 3,391 608 105 - - 7 4,111
Georgia 3,412 1,400 371 23 - 6 5,212 10,924 1,495 211 - 42 20 12,692
Hawaii 100 131 63 - - 3 297 246 49 16 - - - 311
Idaho 1,145 208 22 - 1 - 1,376 5,385 270 20 - - - 5,675
Illinois 3,997 415 292 - - 5 4,709 12,986 765 33 - 2 - 13,786
Indiana 2/ 1,075 1,051 96 - 1 - 2,223 8,334 1,701 680 7 42 - 10,764
Iowa 3,606 303 2 - - - 3,911 14,155 157 27 - - - 14,339
Kansas 3,934 350 - - - - 4,284 22,871 12 - - - - 22,883
Kentucky 367 901 340 2 60 55 1,725 4,020 1,837 232 21 13 47 6,170
Louisiana 768 598 129 92 2 - 1,589 3,919 591 154 8 - - 4,672
Maine 371 523 103 14 2 - 1,013 2,665 481 70 2 3 - 3,221
Maryland 230 430 159 21 - - 840 942 440 149 2 - - 1,533
Massachusetts 275 78 53 - - - 406 1,058 80 - - - - 1,138
Michigan 2,823 1,936 158 - 9 32 4,958 14,758 1,729 142 - - 10 16,639
Minnesota 3/ 4,915 1,728 240 27 - 1 6,911 15,630 522 60 3 - - 16,215
Mississippi 2,281 1,002 400 3 - 7 3,693 10,405 1,050 207 - 5 - 11,667
Missouri 2,663 874 379 7 12 26 3,961 15,110 1,085 212 46 - - 16,453
Montana 2,745 209 26 - - 1 2,981 6,948 79 32 - - 3 7,062
Nebraska 3,689 479 - - - - 4,168 11,339 127 5 - 1 7 11,479
Nevada 643 42 15 - 8 29 737 1,994 68 - - 12 - 2,074
New Hampshire 110 265 80 3 6 4 468 770 254 69 - - 2 1,095
New Jersey 151 97 60 - - 5 313 477 436 49 - 4 - 966
New Mexico 1,288 353 197 62 - 35 1,935 3,538 112 134 - - 93 3,877
New York 2,075 1,336 298 - 31 3 3,743 4,658 943 78 - - 12 5,691
North Carolina 510 781 599 294 225 199 2,608 4,327 2,195 956 21 407 88 7,994
North Dakota 2,515 1 - - - - 2,516 11,503 16 - - - - 11,519
Ohio 1,648 921 86 - - - 2,655 9,324 1,878 129 - - - 11,331
Oklahoma 2,191 494 - - - - 2,685 20,713 506 8 2 - - 21,229
Oregon 1,864 358 110 12 1 16 2,361 7,688 451 153 - - - 8,292
Pennsylvania 2,243 1,807 450 - 40 - 4,540 5,940 1,220 63 - - - 7,223
Rhode Island 21 42 3 - - - 66 103 43 - - - - 146
South Carolina 3,288 - - - - - 3,288 10,484 - - - - - 10,484
South Dakota 3,336 - - - - - 3,336 12,444 - - - - - 12,444
Tennessee 1,196 1,329 668 6 - - 3,199 4,072 889 147 - - - 5,108
Texas 5,729 3,863 365 13 6 26 10,002 32,618 2,510 692 1 8 11 35,840
Utah 730 445 133 73 2 108 1,491 2,556 381 136 - 86 34 3,193
Vermont 197 344 172 - 13 1 727 1,503 432 56 11 - 5 2,007
Virginia 1,959 1,156 274 12 8 3 3,412 7,919 1,185 187 - - 3 9,294
Washington 1,257 500 108 - - - 1,865 7,457 606 106 3 - - 8,172
West Virginia 603 291 268 - 42 134 1,338 4,473 996 136 - 29 4 5,638
Wisconsin 4,832 - - - - - 4,832 12,579 - - - - - 12,579
Wyoming 1,117 85 14 4 1 - 1,221 2,798 77 3 - - - 2,878
U.S. Total 90,611 33,337 8,898 884 680 878 135,288 378,223 33,729 6,201 147 764 369 419,433
Puerto Rico 107 87 5 6 27 - 232 186 43 4 5 6 - 244
Grand Total 90,718 33,424 8,903 890 707 878 135,520 378,409 33,772 6,205 152 770 369 419,677

October 2009
Sheet 3 of 4
Table HM-61

Urban

STATE VOLUME-SERVICE FLOW RATIO (V/SF)
INTERSTATE OTHER FREEWAYS AND 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 - 34 133 35 63 97 362 - 3 21 9 3 4 40 115 470 360 39 37 35 1,056
Alaska 9 29 26 1 3 - 68 - - - - - - - 6 16 22 2 4 9 59
Arizona 2 53 51 16 21 45 188 9 12 86 22 24 17 170 91 443 592 127 113 33 1,399
Arkansas - 20 80 18 38 39 195 26 27 27 6 5 8 99 96 245 171 20 58 30 620
California 2 50 149 164 333 481 1,179 54 164 457 192 444 238 1,549 488 1,505 3,229 333 443 417 6,415
Colorado 10 48 94 38 44 35 269 49 85 119 22 29 10 314 193 331 476 71 70 49 1,190
Connecticut - 12 92 56 75 67 302 9 36 77 36 45 35 238 45 207 320 42 52 19 685
Delaware - 2 21 1 6 11 41 2 1 21 1 2 3 30 20 34 67 21 26 10 178
Dist. of Columbia - - 2 5 3 2 12 1 2 10 1 2 4 20 2 18 48 4 16 13 101
Florida - 12 358 88 132 129 719 15 76 229 61 108 84 573 189 911 1,846 325 229 87 3,587
Georgia - 33 168 94 83 149 527 10 30 39 7 10 18 114 494 682 585 66 50 74 1,951
Hawaii 2 8 15 8 11 5 49 1 3 17 4 7 2 34 8 87 103 16 6 7 227
Idaho 5 36 14 11 10 16 92 - - - - - - - 60 148 99 15 28 15 365
Illinois 48 201 182 121 149 102 803 32 27 33 16 4 5 117 468 968 1,278 135 139 52 3,040
Indiana 2/ 8 184 147 38 48 27 452 38 62 27 3 5 - 135 171 575 595 95 63 34 1,533
Iowa 1 25 69 15 21 22 153 - - - - - - - 360 311 133 - - - 804
Kansas 40 44 63 31 10 25 213 25 87 42 6 6 20 186 279 227 201 18 27 33 785
Kentucky - 3 64 5 48 89 209 15 22 16 - 8 6 67 55 195 325 84 80 41 780
Louisiana 12 23 135 31 56 60 317 - 20 15 5 - 2 42 131 298 345 54 74 146 1,048
Maine 11 30 25 1 1 - 68 7 5 7 - - - 19 11 70 51 4 3 1 140
Maryland 10 7 63 60 86 72 298 18 57 108 29 48 33 293 105 279 477 106 85 27 1,079
Massachusetts 2 52 214 46 54 108 476 9 99 110 40 54 2 314 210 515 763 78 224 56 1,846
Michigan 15 111 225 54 130 99 634 24 76 132 16 57 24 329 247 931 721 110 112 181 2,302
Minnesota 3/ 4 9 36 13 54 135 251 5 9 34 19 24 66 157 75 165 222 47 55 24 588
Mississippi - 53 80 20 24 29 206 13 38 15 - 4 - 70 276 298 270 33 42 65 984
Missouri 15 49 192 67 61 74 458 25 44 159 13 48 110 399 135 382 429 43 44 137 1,170
Montana 22 39 - - - - 61 - - - - - - - 35 90 59 1 2 - 187
Nebraska 1 16 20 8 9 7 61 3 7 10 - 1 - 21 124 173 154 12 9 - 472
Nevada 20 12 15 6 20 43 116 1 6 13 1 15 13 49 34 58 127 23 16 25 283
New Hampshire 5 11 28 8 20 5 77 - 3 18 12 9 14 56 21 71 95 8 22 4 221
New Jersey - 17 85 30 78 157 367 3 39 135 36 90 98 401 86 365 600 222 286 145 1,704
New Mexico 23 58 45 9 4 17 156 5 - - - - - 5 302 189 106 39 16 45 697
New York 36 152 235 100 136 192 851 70 127 282 60 76 184 799 271 869 1,054 200 228 221 2,843
North Carolina 5 7 161 85 127 181 566 21 116 138 40 34 49 398 111 498 782 154 136 95 1,776
North Dakota 17 23 9 3 - - 52 - - - - - - - 66 51 42 3 4 3 169
Ohio 8 43 259 98 207 235 850 101 164 162 14 25 17 483 488 1,079 697 61 58 27 2,410
Oklahoma 6 67 86 17 40 33 249 32 70 50 6 10 22 190 436 439 149 12 11 - 1,047
Oregon 10 20 72 16 39 15 172 - 5 25 8 9 10 57 72 240 360 50 21 14 757
Pennsylvania 18 92 287 85 80 126 688 71 206 142 17 73 41 550 211 865 1,083 216 235 231 2,841
Rhode Island - - 17 2 10 13 42 7 18 39 7 10 6 87 36 135 155 9 16 7 358
South Carolina 236 - - - - - 236 82 - - - - - 82 1,016 - - - - - 1,016
South Dakota 76 - - - - - 76 11 - - - - - 11 136 - - - - - 136
Tennessee 4 50 157 49 48 109 417 14 43 54 22 10 5 148 132 497 604 89 127 95 1,544
Texas 24 129 326 169 229 175 1,052 95 264 380 98 200 207 1,244 887 1,598 1,650 352 348 377 5,212
Utah 13 29 85 39 20 25 211 - 2 6 - 3 2 13 9 123 148 29 23 31 363
Vermont 4 16 19 1 - - 40 6 10 4 - - 1 21 6 38 42 8 5 4 103
Virginia 19 56 195 64 73 42 449 46 35 116 15 26 11 249 203 440 438 50 71 67 1,269
Washington 1 38 143 46 63 5 296 27 123 160 31 21 13 375 87 385 532 73 135 97 1,309
West Virginia 2 62 104 8 2 - 178 1 7 1 - - - 9 58 135 108 4 7 14 326
Wisconsin 263 - - - - - 263 274 - - - - - 274 1,865 - - - - - 1,865
Wyoming 47 48 2 - - - 97 3 - - - - - 3 107 65 34 1 3 1 211
U.S. Total 1,056 2,113 5,048 1,880 2,769 3,298 16,164 1,260 2,230 3,536 875 1,549 1,384 10,834 11,129 18,714 22,747 3,504 3,859 3,098 63,051
Puerto Rico 5 48 99 18 34 29 233 1 16 24 5 11 7 64 37 91 156 27 26 55 392
Grand Total 1,061 2,161 5,147 1,898 2,803 3,327 16,397 1,261 2,246 3,560 880 1,560 1,391 10,898 11,166 18,805 22,903 3,531 3,885 3,153 63,443

October 2009
Sheet 4 of 4
Table HM-61

Urban

STATE VOLUME SERVICE FLOW RATIO (V/SF)
MINOR ARTERIAL 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 1,050 789 296 18 27 15 2,195 1,340 606 139 10 21 31 2,147
Alaska 85 54 45 16 6 1 207 210 83 47 3 1 - 344
Arizona 461 546 491 99 110 86 1,793 774 464 286 31 6 70 1,631
Arkansas 485 363 191 18 5 35 1,097 663 196 68 15 12 12 966
California 2,358 3,176 3,197 455 841 599 10,626 4,310 3,357 2,303 433 424 271 11,098
Colorado 581 562 395 47 53 21 1,659 890 494 247 46 51 61 1,789
Connecticut 337 686 450 52 65 71 1,661 881 539 363 3 10 54 1,850
Delaware 20 76 73 12 7 3 191 155 81 100 11 8 12 367
Dist. of Columbia 19 58 50 6 11 21 165 15 68 46 5 11 10 155
Florida 481 1,158 1,603 214 241 322 4,019 1,907 2,224 1,622 215 346 505 6,819
Georgia 1,164 1,528 1,038 78 238 184 4,230 1,214 736 421 125 89 79 2,664
Hawaii 20 38 45 4 4 6 117 128 134 95 25 8 1 391
Idaho 218 205 152 16 41 18 650 367 155 65 5 7 11 610
Illinois 993 1,377 1,212 217 163 367 4,329 1,799 1,056 1,204 123 78 226 4,486
Indiana 2/ 514 667 720 120 238 176 2,435 875 671 420 68 67 114 2,215
Iowa 699 547 237 36 26 3 1,548 579 250 124 20 43 36 1,052
Kansas 516 386 351 28 63 54 1,398 751 300 266 6 32 26 1,381
Kentucky 287 320 277 75 29 28 1,016 460 312 148 24 10 6 960
Louisiana 643 554 424 67 89 97 1,874 1,227 461 358 30 96 23 2,195
Maine 47 109 64 5 7 1 233 371 125 34 1 2 1 534
Maryland 294 491 498 74 38 30 1,425 709 600 245 67 101 21 1,743
Massachusetts 1,418 1,322 657 108 168 86 3,759 1,752 675 329 37 85 33 2,911
Michigan 1,291 1,996 1,190 120 81 94 4,772 1,961 957 458 25 43 50 3,494
Minnesota 3/ 480 798 635 77 114 179 2,283 1,042 359 360 24 128 91 2,004
Mississippi 282 302 189 48 26 34 881 852 277 181 39 31 33 1,413
Missouri 874 519 344 37 32 120 1,926 1,761 266 127 9 64 65 2,292
Montana 107 81 44 2 8 2 244 178 121 16 2 4 1 322
Nebraska 299 200 172 22 11 50 754 170 172 71 20 4 25 462
Nevada 120 175 212 48 43 31 629 347 100 83 32 5 59 626
New Hampshire 105 192 132 24 17 26 496 199 131 95 15 17 49 506
New Jersey 1,122 1,027 806 42 267 220 3,484 1,266 759 543 71 9 111 2,759
New Mexico 370 168 52 12 10 - 612 1,209 161 101 - 10 13 1,494
New York 1,317 2,384 1,319 178 238 260 5,696 2,016 1,530 1,055 121 401 300 5,423
North Carolina 884 876 932 189 158 124 3,163 1,589 613 467 88 59 64 2,880
North Dakota 147 67 61 4 11 4 294 168 82 22 1 6 10 289
Ohio 1,323 1,254 968 149 127 79 3,900 2,530 1,276 676 43 43 63 4,631
Oklahoma 1,594 350 185 10 2 - 2,141 964 71 14 1 - - 1,050
Oregon 283 390 235 61 76 74 1,119 901 562 234 38 77 67 1,879
Pennsylvania 813 1,605 1,099 165 75 198 3,955 2,597 1,186 1,096 86 123 240 5,328
Rhode Island 87 169 97 4 5 - 362 451 109 39 5 10 - 614
South Carolina 1,454 - - - - - 1,454 2,399 - - - - - 2,399
South Dakota 372 - - - - - 372 250 - - - - - 250
Tennessee 514 701 785 64 175 214 2,453 910 638 342 96 98 93 2,177
Texas 2,002 2,092 1,732 352 377 468 7,023 4,423 2,275 1,571 393 303 500 9,465
Utah 285 243 177 33 52 23 813 477 139 153 6 11 13 799
Vermont 61 52 23 4 8 4 152 185 27 3 1 - - 216
Virginia 470 874 655 36 93 86 2,214 1,304 593 359 1 25 52 2,334
Washington 855 810 623 89 143 50 2,570 1,135 665 406 22 76 34 2,338
West Virginia 191 280 176 18 13 44 722 504 143 55 11 1 2 716
Wisconsin 2,432 - - - - - 2,432 2,175 - - - - - 2,175
Wyoming 92 40 28 6 - 1 167 316 113 52 10 13 3 507
U.S. Total 32,916 32,657 25,337 3,559 4,632 4,609 103,710 55,656 26,912 17,509 2,463 3,069 3,541 109,150
Puerto Rico 299 358 203 49 44 57 1,010 795 240 127 17 17 38 1,234
Grand Total 33,215 33,015 25,540 3,608 4,676 4,666 104,720 56,451 27,152 17,636 2,480 3,086 3,579 110,384

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/Excludes 788 miles of Federal agency owned roads.

3/Excludes 437 miles of local government owned roads.

Updated: 01/03/2012

FHWA
United States Department of Transportation - Federal Highway Administration