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Table HM-42 - Highway Statistics 2007 - Highway Statistic Series - Policy Information - FHWA

October 2008
Sheet 1 OF 2
Table HM-42

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STATE VOLUME-SERVICE FLOW RATIO (V/SF)
INTERSTATE SYSTEM OTHER 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 < 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 12 543 478 1,214 283 9 1 34 2,019 478 1,324 574 77 63 46 2,562
Alaska 629 225 118 4 34 3 1,013 765 213 3 - - - 981 1,394 438 121 4 34 3 1,994
Arizona 63 604 281 24 7 1 980 374 477 257 - - 6 1,114 437 1,081 538 24 7 7 2,094
Arkansas - 123 281 38 6 12 460 771 664 261 5 109 2 1,812 771 787 542 43 115 14 2,272
California 13 302 484 129 263 90 1,281 621 1,426 916 192 137 121 3,413 634 1,728 1,400 321 400 211 4,694
Colorado 198 353 105 8 21 - 685 708 758 266 52 34 40 1,858 906 1,111 371 60 55 40 2,543
Connecticut - 9 21 8 5 - 43 16 56 65 4 13 3 157 16 65 86 12 18 3 200
Delaware - - - - - - - 9 58 81 4 17 1 170 9 58 81 4 17 1 170
Dist. of Columbia - - - - - - - - - - - - - - - - - - - - -
Florida - 278 451 11 9 - 749 396 806 189 44 17 20 1,472 396 1,084 640 55 26 20 2,221
Georgia 10 178 273 141 89 24 715 1,799 1,074 177 72 7 23 3,152 1,809 1,252 450 213 96 47 3,867
Hawaii - - - 6 - - 6 - 56 32 7 6 - 101 - 56 32 13 6 - 107
Idaho 240 282 - - - - 522 981 587 52 12 6 9 1,647 1,221 869 52 12 6 9 2,169
Illinois 411 741 187 - 8 10 1,357 1,300 334 7 - - - 1,641 1,711 1,075 194 - 8 10 2,998
Indiana 2/ 94 491 91 14 17 - 707 506 691 115 2 - 1 1,315 600 1,182 206 16 17 1 2,022
Iowa 31 312 228 49 6 1 627 1,216 781 39 - - - 2,036 1,247 1,093 267 49 6 1 2,663
Kansas 312 300 31 - - - 643 1,921 609 51 - - - 2,581 2,233 909 82 - - - 3,224
Kentucky - 163 352 26 12 - 553 668 711 246 66 32 9 1,732 668 874 598 92 44 9 2,285
Louisiana 24 195 243 7 7 - 476 309 543 168 2 - - 1,022 333 738 411 9 7 - 1,498
Maine 137 116 40 6 - - 299 174 461 147 - - 5 787 311 577 187 6 - 5 1,086
Maryland 37 32 55 11 27 22 184 113 134 173 9 13 17 459 150 166 228 20 40 39 643
Massachusetts 7 26 31 9 1 17 91 49 45 52 - 20 - 166 56 71 83 9 21 17 257
Michigan 63 303 168 74 - - 608 719 1,156 219 6 12 24 2,136 782 1,459 387 80 12 24 2,744
Minnesota 3/ 199 104 228 42 27 61 661 642 1,442 430 13 39 7 2,573 841 1,546 658 55 66 68 3,234
Mississippi 33 336 68 14 34 7 492 901 501 268 - - 12 1,682 934 837 336 14 34 19 2,174
Missouri 80 300 332 9 1 - 722 625 1,299 416 41 16 23 2,420 705 1,599 748 50 17 23 3,142
Montana 912 218 - - - - 1,130 1,904 644 63 5 - - 2,616 2,816 862 63 5 - - 3,746
Nebraska 81 222 112 6 - - 421 1,858 434 16 - - - 2,308 1,939 656 128 6 - - 2,729
Nevada 346 54 25 - 1 25 451 1,006 219 152 9 2 33 1,421 1,352 273 177 9 3 58 1,872
New Hampshire 21 98 23 3 - 6 151 41 170 185 9 2 5 412 62 268 208 12 2 11 563
New Jersey - 7 23 5 17 13 65 23 88 68 19 52 3 253 23 95 91 24 69 16 318
New Mexico 332 338 171 2 - 1 844 1,150 460 72 - - 27 1,709 1,482 798 243 2 - 28 2,553
New York 303 189 245 64 5 29 835 635 584 217 53 5 8 1,502 938 773 462 117 10 37 2,337
North Carolina 25 12 263 79 120 42 541 111 882 784 30 118 42 1,967 136 894 1,047 109 238 84 2,508
North Dakota 397 123 - - - - 520 1,974 114 - - - - 2,088 2,371 237 - - - - 2,608
Ohio 42 140 428 33 63 17 723 850 657 115 24 3 - 1,649 892 797 543 57 66 17 2,372
Oklahoma 63 414 156 28 20 2 683 1,330 732 25 2 - - 2,089 1,393 1,146 181 30 20 2 2,772
Oregon 75 261 200 4 11 4 555 1,134 919 473 11 34 40 2,611 1,209 1,180 673 15 45 44 3,166
Pennsylvania 42 516 405 50 55 3 1,071 619 817 355 14 2 - 1,807 661 1,333 760 64 57 3 2,878
Rhode Island - - - 5 13 1 19 14 28 5 - - - 47 14 28 5 5 13 1 66
South Carolina 578 - - - - - 578 1,106 - - - - - 1,106 1,684 - - - - - 1,684
South Dakota 603 - - - - - 603 2,186 - - - - - 2,186 2,789 - - - - - 2,789
Tennessee 28 103 364 126 52 14 687 573 648 180 11 15 - 1,427 601 751 544 137 67 14 2,114
Texas 688 757 602 20 77 36 2,180 3,114 2,421 668 47 43 90 6,383 3,802 3,178 1,270 67 120 126 8,563
Utah 309 254 154 8 - - 725 233 480 175 - 2 27 917 542 734 329 8 2 27 1,642
Vermont 92 117 70 - - 1 280 32 187 89 3 1 7 319 124 304 159 3 1 8 599
Virginia 51 212 363 23 17 - 666 777 393 125 1 - 8 1,304 828 605 488 24 17 8 1,970
Washington 3 190 214 44 17 - 468 731 863 350 3 33 - 1,980 734 1,053 564 47 50 - 2,448
West Virginia 20 152 113 22 18 50 375 501 392 50 4 22 46 1,015 521 544 163 26 40 96 1,390
Wisconsin 478 - - - - - 478 2,463 - - - - - 2,463 2,941 - - - - - 2,941
Wyoming 493 305 19 - - - 817 1,456 371 87 5 32 10 1,961 1,949 676 106 5 32 10 2,778
U.S. Total 8,563 10,565 8,309 1,220 1,122 504 30,283 41,882 28,599 9,167 790 845 703 81,986 50,445 39,164 17,476 2,010 1,967 1,207 112,269
Puerto Rico - 6 23 - - 1 30 4 19 7 - - - 30 4 25 30 - - 1 60
Grand Total 8,563 10,571 8,332 1,220 1,122 505 30,313 41,886 28,618 9,174 790 845 703 82,016 50,449 39,189 17,506 2,010 1,967 1,208 112,329

October 2008
Sheet 2 OF 2
Table HM-42

STATE VOLUME-SERVICE FLOW RATIO (V/SF)
INTERSTATE SYSTEM OTHER 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 < 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 62 312 279 25 26 35 739 62 346 412 60 89 132 1,101
Alaska 9 29 26 1 3 - 68 19 21 20 3 4 8 75 28 50 46 4 7 8 143
Arizona 2 53 51 16 21 45 188 35 141 202 32 37 21 468 37 194 253 48 58 66 656
Arkansas - 20 80 18 38 39 195 70 90 61 12 12 14 259 70 110 141 30 50 53 454
California 2 50 149 164 333 481 1,179 76 279 516 173 493 243 1,780 78 329 665 337 826 724 2,959
Colorado 10 48 94 38 44 35 269 95 185 351 44 49 13 737 105 233 445 82 93 48 1,006
Connecticut - 12 92 56 75 67 302 11 98 187 53 62 48 459 11 110 279 109 137 115 761
Delaware - 2 21 1 6 11 41 5 25 61 9 13 12 125 5 27 82 10 19 23 166
Dist. of Columbia - - 2 5 3 2 12 1 9 39 4 8 8 69 1 9 41 9 11 10 81
Florida - 12 358 88 132 129 719 89 328 523 124 188 117 1,369 89 340 881 212 320 246 2,088
Georgia - 33 168 94 83 149 527 316 404 275 25 44 51 1,115 316 437 443 119 127 200 1,642
Hawaii 2 8 15 8 11 5 49 7 72 72 16 10 7 184 9 80 87 24 21 12 233
Idaho 5 36 14 11 10 16 92 18 43 23 3 2 5 94 23 79 37 14 12 21 186
Illinois 48 201 182 121 149 102 803 256 485 860 119 133 41 1,894 304 686 1,042 240 282 143 2,697
Indiana 2/ 8 184 147 38 48 27 452 40 128 151 35 28 7 389 48 312 298 73 76 34 841
Iowa 1 25 69 15 21 22 153 159 164 81 - - 1 405 160 189 150 15 21 23 558
Kansas 40 44 63 31 10 25 213 131 104 42 7 5 22 311 171 148 105 38 15 47 524
Kentucky - 3 64 5 48 89 209 22 106 161 29 39 28 385 22 109 225 34 87 117 594
Louisiana 12 23 135 31 56 60 317 115 191 169 37 38 101 651 127 214 304 68 94 161 968
Maine 11 30 25 1 1 - 68 14 70 46 2 3 1 136 25 100 71 3 4 1 204
Maryland 10 7 63 60 86 72 298 30 93 253 40 69 30 515 40 100 316 100 155 102 813
Massachusetts 2 52 214 46 54 108 476 54 363 482 100 179 38 1,216 56 415 696 146 233 146 1,692
Michigan 15 111 225 54 130 99 634 98 464 541 83 131 59 1,376 113 575 766 137 261 158 2,010
Minnesota 3/ 4 9 36 13 54 135 251 50 94 170 45 45 92 496 54 103 206 58 99 227 747
Mississippi - 53 80 20 24 29 206 104 147 105 15 25 37 433 104 200 185 35 49 66 639
Missouri 15 49 192 67 61 74 458 81 184 311 39 57 136 808 96 233 503 106 118 210 1,266
Montana 22 39 - - - - 61 11 34 21 1 - - 67 33 73 21 1 - - 128
Nebraska 1 16 20 8 9 7 61 65 84 112 6 8 - 275 66 100 132 14 17 7 336
Nevada 20 12 15 6 20 43 116 16 29 47 8 19 28 147 36 41 62 14 39 71 263
New Hampshire 5 11 28 8 20 5 77 19 46 62 17 14 15 173 24 57 90 25 34 20 250
New Jersey - 17 85 30 78 157 367 33 276 509 113 212 230 1,373 33 293 594 143 290 387 1,740
New Mexico 23 58 45 9 4 17 156 83 108 26 - 5 1 223 106 166 71 9 9 18 379
New York 36 152 235 100 136 192 851 196 489 772 98 172 241 1,968 232 641 1,007 198 308 433 2,819
North Carolina 5 7 161 85 127 181 566 79 208 282 65 104 66 804 84 215 443 150 231 247 1,370
North Dakota 17 23 9 3 - - 52 28 20 19 - - 1 68 45 43 28 3 - 1 120
Ohio 8 43 259 98 207 235 850 260 464 390 40 39 22 1,215 268 507 649 138 246 257 2,065
Oklahoma 6 67 86 17 40 33 249 123 140 65 7 13 18 366 129 207 151 24 53 51 615
Oregon 10 20 72 16 39 15 172 38 118 158 37 17 29 397 48 138 230 53 56 44 569
Pennsylvania 18 92 287 85 80 126 688 175 712 651 89 211 102 1,940 193 804 938 174 291 228 2,628
Rhode Island - - 17 2 10 13 42 12 37 73 7 11 10 150 12 37 90 9 21 23 192
South Carolina 236 - - - - - 236 658 - - - - - 658 894 - - - - - 894
South Dakota 76 - - - - - 76 74 - - - - - 74 150 - - - - - 150
Tennessee 4 50 157 49 48 109 417 60 249 272 66 70 35 752 64 299 429 115 118 144 1,169
Texas 24 129 326 169 229 175 1,052 380 867 1,244 289 448 446 3,674 404 996 1,570 458 677 621 4,726
Utah 13 29 85 39 20 25 211 19 84 91 18 15 33 260 32 113 176 57 35 58 471
Vermont 4 16 19 1 - - 40 6 15 20 5 4 2 52 10 31 39 6 4 2 92
Virginia 19 56 195 64 73 42 449 124 339 375 56 55 63 1,012 143 395 570 120 128 105 1,461
Washington 1 38 143 46 63 5 296 73 195 236 40 49 24 617 74 233 379 86 112 29 913
West Virginia 2 62 104 8 2 - 178 35 102 70 4 5 6 222 37 164 174 12 7 6 400
Wisconsin 263 - - - - - 263 959 - - - - - 959 1,222 - - - - - 1,222
Wyoming 47 48 2 - - - 97 54 18 5 - 3 - 80 101 66 7 - 3 - 177
U.S. Total 1,056 2,113 5,048 1,880 2,769 3,298 16,164 5,538 9,234 11,481 2,040 3,174 2,547 34,014 6,594 11,347 16,529 3,920 5,943 5,845 50,178
Puerto Rico 5 48 99 18 34 29 233 9 26 39 9 15 14 112 14 74 138 27 49 43 345
Grand Total 1,061 2,161 5,147 1,898 2,803 3,327 16,397 5,547 9,260 11,520 2,049 3,189 2,561 34,126 6,608 11,421 16,667 3,947 5,992 5,888 50,523

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 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.

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Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000