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Table 3: Interstate Routes

Table 3: Interstate Routes in Each of the 50 States, District of Columbia, and Puerto Rico
State Interstate Route Total Miles Net Miles Howard-Cramer Miles Sections 103(c)(4)(A) Miles ISTEA Miles Overlap Miles Route
Alabama I-10 66.31 66.31 - - - - -
I-20 214.7 84.6 - - - 130.1 I-59
I-22 96.22 96.22 - - 96.22 - -
I-59 241.36 241.36 - - - - -
I-65 367 367 - - - - -
I-85 80 80 - - - - -
I-165 4.9 4.9 - - - - -
I-359 2.3 2.3 - - - - -
I-459 32.8 32.8 - - - - -
I-565 21.4 21.4 - - - - -
I-685 14 0 - - - 14 I-85
I-759 4.5 4.5 - - - - -
12 Routes 1,145.49 1,001.39 - - 96.22 144.10 -
Alaska A-1 408.23 408.23 - 408.23 - - -
A-2 202.18 202.18 - 202.18 - - -
A-3 148.12 148.12 - 148.12 - - -
A-4 323.69 323.69 - 323.69 - - -
4 Routes 1,082.22 1,082.22 - 1,082.22 - -  
Arizona I-8 178.33 178.33 - - - - -
I-10 392.33 392.33 - - - - -
I-15 29.39 29.39 - - - - -
I-17 145.76 145.76 - - - - -
I-19 63.35 63.35 - - - - -
I-40 359.48 359.48 - - - - -
6 Routes 1,168.64 1,168.64 - - - - -
Arkansas I-30 143.02 143.02 - - - - -
I-40 284.69 284.69 - - - - -
I-49 109.81 109.81 - - 109.81 -  
I-55 72.22 70 - - - 2.22 I-40
I-430 12.93 12.93 - - - - -
I-440 9.96 9.96 - 9.96 - - -
I-530 46.65 46.65 - 46.65 - - -
I-540 15.87 15.87 - 5.97 - - -
I-555 49.57 49.57 - - - - -
I-630 7.4 7.4 - - - - -
10 Routes 752.12 749.9 - 62.58 109.81 2.22 -
California I-5 796.53 796.53 - - - - -
I-8 169.92 169.92 - - - - -
I-10 242.54 240.94 - - - 1.6 I-5
I-15 287.26 287.26 - - - - -
I-40 154.61 154.61 - - - - -
I-80 199.24 199.24 - - - - -
I-105 17.32 17.32 7 - - - -
I-110 20.43 20.43 - - - - -
I-205 12.97 12.97 - - - - -
I-210 48.72 48.72 - - - - -
I-215 54.5 54.5 - 54.5 - - -
I-238 2.23 2.23 - 2.23 - - -
I-280 57.22 57.22 - - - - -
I-305 6 6 - - - - -
I-380 3.3 3.3 - - - - -
I-405 72.15 72.15 - - - - -
I-505 32.98 32.98 - - - - -
I-580 75.63 75.63 - 7.3 - - -
I-605 27.4 27.4 - - - - -
I-680 70.52 70.52 - 12.5 - - -
I-710 19.66 19.66 - 19.66 - - -
I-780 6.5 6.5 - - - - -
I-805 28.02 28.02 - - - - -
I-880 47.22 47.22 - 47.22 - - -
I-980 2.03 2.03 - 1 - - -
25 Routes 2,457.34 2,455.74 7 144.41 - 1.6  
Colorado I-25 298.6 298.6 - - - - -
I-70 450.18 450.18 - - - - -
I-76 184 184 - - - - -
I-225 12.46 12.46 - - - - -
I-270 6.61 6.61 - - - - -
5 Routes 951.85 951.85 - - - - -
Connecticut I-84 97.9 97.9 - - - - -
I-91 58 58 - - - - -
I-95 111.57 111.57 - - - - -
I-291 6.02 6.02 - - - - -
I-384 8.2 8.2 - - - - -
I-395 54.69 54.69 - 54.69 - - -
I-684 1.41 1.41 - - - - -
I-691 8.38 8.38 6.69 - - - -
8 Routes 346.17 346.17 6.69 54.69 - - -
Delaware I-95 23.43 23.43 - - - - -
I-295 5.71 5.71 - - - - -
I-495 11.47 11.47 - - - - -
3 Routes 40.61 40.61 - - - - -
District of Columbia I-66 1.48 1.48 - - - - -
I-95 0.11 0.11 - - - - -
I-195 2 2 - - - - -
I-295 5.2 5.2 - - - - -
I-395 3.48 3.48 - - - - -
5 Routes 12.27 12.27 - - - - -
Florida I-4 132.3 132.3 - - - - -
I-10 362.28 362.28 - - - - -
I-75 470.88 470.88 46.31 - - - -
I-95 382.15 382.15 - - - - -
I-110 6.94 6.94 - - - - -
I-175 1.44 1.44 - 1.44 - - -
I-195 4.42 4.42 - - - - -
I-275 60.64 60.64 - - - - -
I-295 61.04 61.04 - 25.53 - - -
I-375 1.34 1.34 - 1.34 - - -
I-395 1.29 1.29 - - - - -
I-595 12.86 12.86 - 8.8 - - -
12 Routes 1,497.58 1,497.58 46.31 37.11 - - -
Georgia I-16 166.81 166.81 - - - - -
I-20 202.61 202.61 - - - - -
I-24 4.1 4.1 - - - - -
I-59 20.67 20.67 - - - - -
I-75 355.11 355.11 - - - - -
I-85 179.9 171.9 - - - 8 I-75
I-95 112 112 - - - - -
I-185 49.3 49.3 - 5.5 - - -
I-285 63.98 62.77 - - - 1.21 I-85
I-475 15.83 15.83 - - - - -
I-516 6.49 6.49 - 6.49 - - -
I-520 10.34 10.34 9.11 - - - -
I-575 30.97 30.97 29.16 - - - -
I-675 11.04 11.04 7.78 - - - -
I-985 24.04 24.04 - 24.04 - - -
15 Routes 1,253.19 1,243.98 46.05 36.03 - 9.21  
Hawaii H-1 27.16 27.16 - - - - -
H-2 8.33 8.33 - - - - -
H-3 15.32 15.32 - - - - -
H-201 4.1 4.1 - 4.1 - - -
4 Routes 54.91 54.91 - 4.1 - - -
Idaho I-15 196 196 - - - - -
I-84 275.74 275.74 - - - - -
I-86 62.85 62.85 - - - - -
I-90 73.55 73.55 - - - - -
I-184 3.62 3.62 - - - - -
5 Routes 611.76 611.76 - - - - -
Illinois I-24 38.73 38.73 - - - - -
I-39 123.42 123.42 - 123.42 - - -
I-41 2.5 0 - - - 2.5 I-94
I-55 313.08 294.38 - - - 18.7 I-70, I-64
I-57 364.16 358.57 - - - 5.59 I-70
I-64 128.12 123.98 - - - 4.14 I-57
I-70 157.33 157.33 - - - - -
I-72 177.25 177.25 - 99.1 - - -
I-74 220.34 214.45 - - - 5.89 I-55
I-80 163.52 163.52 - - - - -
I-88 140.6 140.6 - 140.6 - - -
I-90 123.89 108.5 - 16.71 - 15.39 I-94
I-94 61.53 59.05 - - - 2.48 I-80
I-155 32.13 32.13 - 32.13 - - -
I-172 19.69 19.69 - 19.69 - - -
I-180 13.19 13.19 - - - - -
I-190 3.07 3.07 - 3.07 - - -
I-255 27.05 27.05 - - - - -
I-270 14.97 14.97 - - - - -
I-280 17.6 8.21 - - - 9.39 I-74
I-290 29.84 29.84 - - - - -
I-294 53.42 48.1 - - - 5.32 I-80
I-355 32.51 32.51 - 32.51 - - -
I-474 14.88 14.88 - - - - -
24 Routes 2,272.82 2,203.42 - 467.23 - 69.40 -
Indiana I-64 123.33 123.33 - - - - -
I-65 261.27 261.27 - - - - -
I-69 294.47 294.47 - - 116.47 - -
I-70 156.6 154.47 - - - 2.13 I-65
I-74 171.54 150.94 - - - 20.6 I-465
I-80 151.56 151.56 - - - - -
I-90 156.28 20.68 - - - 135.6 I-80
I-94 46.13 30.08 - - - 16.05 I-80
I-164 21.24 21.24 - - - - -
I-265 6.73 6.73 - - - - -
I-275 3.16 3.16 - - - - -
I-465 52.73 52.73 - 5.03 - - -
I-469 30.83 30.83 - 30.83 - - -
I-865 5.03 5.03 - - - - -
14 Routes 1,480.90 1,306.52 - 35.86 116.47 174.38 -
Iowa I-29 164.66 164.66 - - - 3 I-80
I-35 218.33 218.33 - - - - -
I-74 5.36 5.36 - - - - -
I-80 303.23 288.94 - - - 14.29 I-35
I-129 0.27 0.27 - - - - -
I-235 13.78 13.78 - - - - -
I-280 9.38 9.38 - - - - -
I-380 73.05 73.05 - - - - -
I-480 0.75 0.75 - - - - -
I-880 19.63 19.63 - - -    
10 Routes 808.44 781.24 - - - 27.2 -
Kansas I-35 235.51 235.51 - - - - -
I-70 424.15 424.15 - - - - -
I-135 95.74 95.74 - - - - -
I-235 16.52 16.52 - - - - -
I-335 50.13 50.13 - 50.13 - - -
I-435 28.03 28.03 - - - - -
I-470 13.72 13.72 - - - - -
I-635 8.9 8.9 - - - - -
I-670 1.64 1.64 - - - - -
9 Routes 874.34 874.34 - 50.13 - - -
Kentucky I-24 93.37 93.37 - - - - -
I-64 185.2 185.2 - - - - -
I-65 137.32 137.32 - - - - -
I-69 80.6 80.6 - - 80.6 - -
I-71 97.42 77.72 - - - 19.7 I-75
I-75 191.78 191.78 - - - - -
I-165 70.2 70.2 - - - - -
I-264 22.93 22.93 - - - - -
I-265 24.48 24.48 - 21.2 - - -
I-275 24.58 24.58 - - - - -
I-471 5.02 5.02 - - - - -
11 Routes 932.9 913.2 - 21.2 80.6 19.7 -
Louisiana I-10 274.42 274.42 - - - - -
I-12 85.59 85.59 - - - - -
I-20 189.87 189.87 - - - - -
I-49 239.25 239.25 153.18 19.55 31 - -
I-55 65.81 65.81 - - - - -
I-59 11.48 11.48 - - - - -
I-110 8.89 8.89 - - - - -
I-210 12.4 12.4 - - - - -
I-220 17.62 17.62 - - - - -
I-310 11.25 11.25 - - - - -
I-510 3.04 3.04 - - - - -
I-610 4.52 4.52 - - - - -
I-910 9.7 9.7 - - 9.7 - -
13 Routes 933.84 933.84 153.18 19.55 40.7 - -
Maine I-95 303 303 - - - - -
I-195 1.55 1.55 - - - - -
I-295 52 52 - - - - -
I-395 4.99 4.99 - - - - -
I-495 4.3 4.3 - 4.3 - - -
5 Routes 365.84 365.84 - 4.3 - - -
Maryland I-68 81.09 81.09 - 81.09 - - -
I-70 93.62 93.62 - - - - -
I-81 12.08 12.08 - - - - -
I-83 34.5 34.5 - - - - -
I-95 110.01 110.01 - - - - -
I-97 17.62 17.62 14.9 - - - -
I-195 4.35 4.35 2.2 1.04 - - -
I-270 34.4 34.4 - - - - -
I-295 0.8 0.8 - - - - -
I-370 2.54 2.54 1.18 - - - -
I-395 1.98 1.98 - - - - -
I-495 16.13 16.13 - - - - -
I-595 19.97 19.97 19.31 - - - -
I-695 30.57 30.57 - 2.2 - - -
I-795 8.99 8.99 - 5.47 - - -
I-895 11.44 11.44 - - - - -
16 Routes 480.09 480.09 37.59 89.8 - - -
Massachusetts I-84 8.15 8.15 - - - - -
I-90 135.72 135.72 - 2.9 - - -
I-91 54.99 54.99 - - - - -
I-93 47.07 47.07 - 14.1 - - -
I-95 91.95 91.95 - 37.54 - - -
I-190 19.26 19.26 - - - - -
I-195 40.73 40.73 - 14.28 - - -
I-290 20.16 20.16 - - - - -
I-291 5.44 5.44 - - - - -
I-295 4.23 4.23 - - - - -
I-391 4.46 4.46 - - - - -
I-395 11.91 11.91 - 11.91 - - -
I-495 121.56 121.56 12.9 18.5 - - -
13 Routes 565.63 565.63 12.9 99.23 - - -
Michigan I-69 198.3 193.1 - 66.8 - 5.2 I-96
I-75 395.54 395.54 - - - - -
I-94 275.49 275.49 - - - - -
I-96 192.06 192.06 - - - - -
I-194 3.4 3.4 - - - - -
I-196 80.8 80.8 - - - - -
I-275 29.97 29.97 - - - - -
I-296 3.5 3.5 - - - - -
I-375 1.1 1.1 - - - - -
I-475 16.9 16.9 - - - - -
I-496 12.1 12.1 - - - - -
I-675 7.7 7.7 - - - - -
I-696 29.3 29.3 - - - - -
13 Routes 1,246.16 1,240.96 - 66.8 - 5.2 -
Minnesota I-35 259.69 220.46 - - - 39.23 I-35E
I-35E 39.34 39.34 - - - - -
I-35W 41.78 41.78 - - - - -
I-90 275.7 275.7 - - - - -
I-94 259.49 259.22 - - - 0.27 I-35E
I-394 9.75 9.75 - - - - -
I-494 42.94 42.94 - - - - -
I-535 1.57 1.57 - - - - -
I-694 22.62 21.97 - - - 0.65 I-35E
9 Routes 952.88 912.73 - - - 40.15 -
Mississippi I-10 77.19 77.19 - - - - -
I-20 154.61 129.41 - - - 25.2 I-55/59
I-22 106 106 - - 106 - -
I-55 290.41 290.41 - - - - -
I-59 171.72 171.72 - - - - -
I-69 23.9 14.7     14.7 9.2 I-55
I-110 4.1 4.1 - - - - -
I-220 12.01 12.01 - - - - -
I-269 25.93 25.93 - - 25.93 - -
9 Routes 865.87 831.47 - - 146.63 34.4 -
Missouri I-29 130.72 125.22 - . - 5.5 I-35/40
I-35 114.74 113.74 - - - 1 I-70
I-44 293.39 293.39 - - - - -
I-49 178.96 178.96 - - 178.96 - -
I-55 210.45 209.45 - - - 1 I-44
I-57 21.96 21.96 - - - - -
I-64 40.5 40.5 - 40.5 - - -
I-70 250.16 250.16 - - - - -
I-72 2.04 2.04 - 2.04 - - -
I-155 10.84 10.84 - - - - -
I-170 11.17 11.17 - 4.29 - - -
I-229 14.97 14.97 - - - - -
I-255 3.77 3.77 - - - - -
I-270 35.62 35.62 - - - - -
I-435 52.78 52.78 - - - - -
I-470 16.72 16.72 - - - - -
I-635 3.77 3.77 - - - - -
I-670 1.17 1.17 - - - - -
18 Routes 1,393.73 1,386.23 - 46.83 178.96 7.50 -
Montana I-15 396.03 396.03 - - - - -
I-90 551.68 544.03 - - - 7.65 I-15
I-94 249.15 249.15 - - - - -
I-115 1.19 1.19 - - - - -
I-315 0.83 0.83 - - - - -
5 Routes 1,198.88 1,191.23 - - - 7.65 -
Nebraska I-76 2.48 2.48 - - - - -
I-80 455.32 455.32 - - - - -
I-129 3.21 3.21 - - - - -
I-180 3.18 3.18 - - - - -
I-480 4.15 4.15 - - - - -
I-680 13.32 13.32 - - - - -
6 Routes 481.66 481.66 - - - - -
Nevada I-11 22.6 22.6 - - 22.6 - -
I-15 123.77 123.77 - - - - -
I-80 410.67 410.67 - - - - -
I-215 11.1 11.1 - 11.1 - - -
I-515 20.54 20.54 - 14.9 - - -
I-580 35.109 35.109 - 31.239 - - -
6 Routes 623.789 623.789 - 57.239 22.6 - -
New Hampshire I-89 60.87 60.87 - - - - -
I-93 131.78 131.78 - - - - -
I-95 16.11 16.11 - - - - -
I-293 11.18 11.18 - 5.68 - - -
I-393 4.6 4.6 - - - - -
5 Routes 224.54 224.54 - 5.68 - -  
New Jersey I-76 3.04 3.04 - - - - -
I-78 67.83 67.83 - - - - -
I-80 68.35 68.35 - - - - -
I-95 97.76 97.76 - - - - -
I-195 34.17 34.17 27.3 - - - -
I-278 2 2 - - - - -
I-280 17.85 17.85 - - - - -
I-287 67.54 67.54 - - - - -
I-295 68.06 68.06 - - - - -
I-676 4.75 4.75 - - - - -
10 Routes 431.36 431.36 27.3 - - - -
New Mexico I-10 164.27 164.27 - - - - -
I-25 462.12 462.12 - - - - -
I-40 373.51 373.51 - - - - -
3 Routes 999.9 999.9 - - - -  
New York I-78 0.5 0.5 - - - - -
I-81 183.6 183.6 - - - - -
I-84 71.79 71.79 - - - - -
I-86 216.4 216.4 - - 216.4 - -
I-87 333.49 333.49 - 29.8 - - -
I-88 117.75 117.75 - - - - -
I-90 385.48 385.48 - - - - -
I-95 23.5 23.5 - - - - -
I-99 12.6 12.6 - - 12.6 - -
I-190 28.34 28.34 - - - - -
I-278 33.62 33.62 - - - - -
I-287 31.18 11.98 - - - 19.2 I-87
I-290 9.8 9.8 - - - - -
I-295 7.7 7.7 - - - - -
I-390 76.06 76.06 60.5 - - - -
I-478 2.14 2.14 - 2.14 - - -
I-481 15.04 15.04 - - - - -
I-490 37.4 37.4 - - - - -
I-495 66.38 66.38 - 62.7 - - -
I-587 1.21 1.21 - - - - -
I-590 5.31 5.31 5.31 - - - -
I-678 14.33 14.33 - 7.8 - - -
I-684 27.06 27.06 - - - - -
I-690 14.19 14.19 - - - - -
I-695 1.4 1.4 - - - - -
I-781 4.3 4.3 - 4.3 - - -
I-787 10.16 10.16 - - - - -
I-790 2.41 2.41 - - - - -
I-878 0.7 0.7 - - - - -
I-890 9.35 9.35 - - - - -
I-990 6.35 6.35 - 2.04 - - -
31 Routes 1,749.54 1,730.34 65.81 108.78 229 19.2 -
North Carolina I-26 52.69 52.69 - 13.75 - - -
I-40 420.21 420.21 - 91.4 - - -
I-73 99.43 99.43 - - 99.43 - -
I-74 75.03 55.86 - - 55.86 19.17 I-73
I-77 105.5 105.5 - 5.8 - - -
I-85 231.23 199.72 - - - 31.51 I-40
I-87 12.9 10 - - - 2.9 I-440
I-95 181.36 181.36 - - - - -
I-140 6.79 6.79 - 6.8 - - -
I-240 9.54 9.54 - 6.92 - - -
I-277 4.46 4.46 - 1.72 - - -
I-285 23.79 23.79 - - - - -
I-295 14.1 14.1 - - - - -
I-440 16.77 16.77 - 16.77 - - -
I-485 66.68 66.68 - 66.68 - - -
I-540 25.84 25.84 - 25.84 - - -
I-587 37.07 37.07   37.07      
I-785 6.81 6.81 - - - - -
I-795 25.46 25.46 - - -    
I-840 13.47 3.1 - - - 10.37 I-73, I-785
19 Routes 1429.13 1365.18 - 235.68 155.29 63.95  
North Dakota I-29 217.54 217.54 - - - - -
I-94 352.39 352.39 - - - - -
I-194 1.2 1.2 - - - - -
3 Routes 571.13 571.13 - - - - -
Ohio I-70 225.6 225.6 - - - - -
I-71 248.15 246.19 - - - 1.96 I-75/70
I-74 19.47 19.47 - - - - -
I-75 211.3 211.3 - - - - -
I-76 81.65 81.65 - - - - -
I-77 160.13 160.13 - - - - -
I-80 237.48 237.48 - 35 - - -
I-90 244.75 101.95 - - - 142.8 I-80
I-270 54.97 54.97 - - - - -
I-271 46.06 40.22 - - - 5.84 I-480
I-275 55.97 52.52 - - - 3.45 I-74
I-277 4.14 4.14 - - - - -
I-280 12.41 12.41 - - - - -
I-470 6.69 6.69 - - - - -
I-471 0.73 0.73 - - - - -
I-475 20.37 20.37 - - - - -
I-480 41.77 41.77 - - - - -
I-490 2.43 2.43 - - - - -
I-670 9.37 9.37 - - - - -
I-675 26.53 26.53 - - - - -
I-680 16.43 16.43 - - - - -
21 Routes 1,726.40 1,572.35 - 35 - 154.05  
Oklahoma I-35 235.96 235.96 - - - - -
I-40 331.73 330.2 - - - 1.53 I-35
I-44 328.53 324.16 - 114.76 - 4.37 I-35
I-235 5.36 5.36 - 1.54 - - -
I-240 16.22 16.22 - 4.35 - - -
I-244 15.75 15.75 - - - - -
I-444 2.51 2.51 - - - - -
7 Routes 936.06 930.16 - 120.65 - 5.9 -
Oregon I-5 308.14 308.14 - - - - -
I-82 11.01 11.01 - - - - -
I-84 375.17 375.17 - 6.89 - - -
I-105 3.49 3.49 - - - - -
I-205 26.07 26.07 - - - - -
I-405 3.53 3.53 - - - - -
6 Routes 727.41 727.41 - 6.89 - - -
Pennsylvania I-70 167.92 80.7 - - - 87.22 I-76
I-76 350.97 350.97 - - - - -
I-78 77.95 77.95 - - - - -
I-79 182.94 179.39 - - - 3.55 I-70
I-80 311.12 311.12 - - - - -
I-81 232.76 232.76 - - - - -
I-83 50.53 50.53 - - - - -
I-84 54.87 54.87 - - - - -
I-86 7 7 - - 7 - -
I-90 46.3 46.3 - - - - -
I-95 51.01 51.01 - - - - -
I-99 85.74 85.74 - - 85.74 - -
I-176 11.33 11.33 - - - - -
I-180 28.84 28.84 - 28.84 - - -
I-276 32.28 32.28 - - - - -
I-279 13.32 13.32 - - - - -
I-283 2.91 2.91 - - - - -
I-376 85.6 85.6 - - - - -
I-380 24.45 24.45 - - - - -
I-476 130.25 130.25 - 110 - - -
I-579 2.73 2.73 - - - - -
I-676 2.16 2.16 - - - - -
22 Routes 1,952.98 1,862.21 - 138.84 92.74 90.77 -
Puerto Rico PRI-1 71.08 71.08 - 71.08 - - -
PRI-2 138.13 138.13 - 138.13 - - -
PRI-3 40.56 40.56 - 40.56 - - -
3 Routes 249.77 249.77 - 249.77 - - -
Rhode Island I-95 42.36 42.36 - - - - -
I-195 3.82 3.82 - - - - -
I-295 22.35 22.35 - - - - -
3 Routes 68.53 68.53 - - - - -
South Carolina I-20 141.51 141.51 - - - - -
I-26 220.95 220.95 - - - - -
I-77 91.05 91.05 - 9.5 - - -
I-85 106.28 106.28 - - - - -
I-95 198.76 198.76 - - - - -
I-126 3.68 3.68 - - - - -
I-185 17.7 17.7 - 14.5 - - -
I-385 42.16 42.16 - 36 - - -
I-520 7.2 7.2 - - - - -
I-526 19.26 19.26 - 11.2 - - -
I-585 2.25 2.25 - - - - -
11 Routes 850.8 850.8 - 71.2 - -  
South Dakota I-29 252.5 252.5 - - - - -
I-90 412.76 412.76 - - - - -
I-190 1.72 1.72 - - - - -
I-229 11.33 11.33 - - - - -
4 Routes 678.31 678.31 - - - - -
Tennessee I-24 180.16 177.96 - - - 2.2 I-40/65
I-26 54.45 54.45 - 54.45 - - -
I-40 455.28 455.28 - 1 - - -
I-55 12.28 12.28 - - - - -
I-65 121.71 120.71 - - - 1 I-40
I-69 14 0 - - - 14 I-55,I-240, I-40
I-75 161.86 142.26 - - - 19.6 I-40
I-81 75.66 75.66 - - - - -
I-124 1.97 1.97 - - - - -
I-140 11.17 11.17 - 11.17 - - -
I-155 15.93 15.93 - - - - -
I-240 19.27 19.27 - - - - -
I-269 19.2 19.2     19.2    
I-275 2.98 2.98 - - - - -
I-440 7.64 7.64 - - - - -
I-640 7.03 7.03 - - - - -
I-840 77 77 - - - - -
17 Routes 1,237.59 1,200.79 - 66.62 - 36.80 -
Texas I-2 46.8 46.8 - - - - -
I-10 881 878.61 - - - 2.39 I-35
I-14 25.1 25.1     25.1    
I-20 636.08 636.08 - 2 - - -
I-27 124.13 124.13 - 12.9 - - -
I-30 223.74 223.74 - 29.93 - - -
I-35 504.15 407.2 - - - 96.95 I-35E
I-35E 96.95 96.95 - - - - -
I-35W 85.2 85.2 - - - - -
I-37 143 143 - - - - -
I-40 177.1 177.1 - - - - -
I-44 14.77 14.77 - 14.77 - - -
I-45 284.91 284.91 - - - - -
I-69 110.3 110.3 - - 110.3 - -
I-69C 18 18 - - 18 - -
I-69E 61.1 61.1 - - 61.1 - -
I-69W 1.4 1.4     1.4    
I-110 0.92 0.92 - - - - -
I-169 4 4 - - 4 - -
I-345 1.4 1.4 - - - - -
I-369 3.5 3.5 - - 3.5 - -
I-410 49.49 49.49 - 9.93 - - -
I-610 37.97 37.97 - - - - -
I-635 37 37 - - - - -
I-820 35.17 35.17 - - - - -
25 Routes 3,603.18 3,503.84 - 69.53 223.40 99.34 -
Utah I-15 400.6 400.6 - - - - -
I-70 231.7 231.7 - - - - -
I-80 197.51 194.2 - - - 3.31 I-15
I-84 117.38 81.4 - - - 35.98 I-15
I-215 28.9 28.9 - - - - -
5 Routes 976.09 936.8 - - - 39.29 -
Vermont I-89 130.25 130.25 - - - - -
I-91 177.38 177.38 - - - - -
I-93 11.1 11.1 - - - - -
I-189 1.49 1.49 - - - - -
4 Routes 320.22 320.22 - - - - -
Virginia I-64 297.62 267.22 - - - 30.4 I-81
I-66 74.8 74.8 - - - - -
I-77 69.4 60.6 - - - 8.8 I-81
I-81 324.92 324.92 - - - - -
I-85 68.64 68.64 - - - - -
I-95 178.73 178.73 - 24.08 - - -
I-195 3.24 3.24 - - - - -
I-264 25.07 25.07 - 12 - - -
I-295 52.56 52.56 - - - - -
I-381 1.67 1.67 - - - - -
I-395 9.91 9.91 - - - - -
I-464 4.71 4.71 - - - - -
I-495 15.28 15.28 - - - - -
I-564 3.03 3.03 - - - - -
I-581 6.64 6.64 - - - - -
I-664 20.21 20.21 - 9.2 - - -
16 Routes 1,156.43 1,117.23 - 45.28 - 39.2 -
Washington I-5 276.62 276.62 - - - - -
I-82 132.57 132.57 - - - - -
I-90 296.92 296.92 - - - - -
I-182 15.19 15.19 - - - - -
I-205 10.57 10.57 - - - - -
I-405 30.3 30.3 - - - - -
I-705 1.5 1.5 - - - - -
7 Routes 763.67 763.67 - - - - -
West Virginia I-64 188.75 124.87 - - - 63.88 I-77
I-68 32.06 32.06 - 32.06 - - -
I-70 14.45 14.45 - - - - -
I-77 187.21 187.21 - - - - -
I-79 160.52 160.52 - - - - -
I-81 26 26 - - - - -
I-470 3.94 3.94 - - - - -
7 Routes 612.93 549.05 - 32.06 - 63.88 -
Wisconsin I-39 182.72 182.72 - 104 - - -
I-41 172.5 132 - - 132 40.5 I-94, I-43, I-894
I-43 191.55 191.55 - 63 - - -
I-90 108.61 108.61 - - - - -
I-94 341.02 249.26 - - - 91.76 I-90
I-535 1.21 1.21 - - - - -
I-794 3.75 3.75 - - - - -
I-894 4.7 4.7 - - - - -
7 Routes 833.56 741.8 - 167 - 91.76 -
Wyoming I-25 300.95 300.95 - - - - -
I-80 402.76 402.76 - - - - -
I-90 208.8 208.8 - - - - -
I-180 1.09 1.09 - - - - -
4 Routes 913.6 913.6 - - - - -
Summary: As of December 31, 2019
State Number of Interstate Routes Total Miles Net Miles Howard-Cramer Miles Section 103(e)(4)(A) Miles ISTEA Miles Overlap Miles
Alabama 12 1,145.49 1,001.39 - - 96.22 144.10
Alaska 4 1,082.22 1,082.22 - 1,082.22 - -
Arizona 6 1,168.64 1,168.64 - - - -
Arkansas 10 752.12 749.9 - 62.58 109.81 2.22
California 25 2,457.34 2,455.74 7 144.41 - 1.6
Colorado 5 951.85 951.85 - - - -
Connecticut 8 346.17 346.17 6.69 54.69 - -
Delaware 3 40.61 40.61 - - - -
District of Columbia 5 12.27 12.27 - - - -
Florida 12 1,497.58 1,497.58 46.31 37.11 - -
Georgia 15 1,253.19 1,243.98 46.05 36.03 - 9.21
Hawaii 4 54.91 54.91 - 4.1 - -
Idaho 5 611.76 611.76 - - - -
Illinois 24 2,272.82 2,203.42 - 467.23 - 69.40
Indiana 14 1,480.90 1,306.52 - 35.86 116.47 174.38
Iowa 10 808.44 781.24 - - - 27.2
Kansas 9 874.34 874.34 0 50.13 - -
Kentucky 11 932.9 913.2 - 21.2 80.6 19.7
Louisiana 13 933.84 933.84 153.18 19.55 40.7 -
Maine 5 365.84 365.84 - 4.3 - -
Maryland 16 481.04 481.04 37.59 90.16 - -
Massachusetts 13 565.63 565.63 12.9 99.23 - -
Michigan 13 1,246.16 1,240.96 - 66.8 - 5.2
Minnesota 9 952.88 912.73 - - - 40.15
Mississippi 9 865.87 831.47 - - 146.63 34.4
Missouri 18 1,393.73 1,386.23 - 46.83 178.96 7.50
Montana 5 1,198.88 1,191.23 - - - 7.65
Nebraska 6 481.66 481.66 - - - -
Nevada 6 623.789 623.789 - 57.239 22.6 -
New Hampshire 5 224.54 224.54 - 5.68 - -
New Jersey 10 431.36 431.36 27.3 - - -
New Mexico 3 999.9 999.9 - - - -
New York 31 1,749.54 1,730.34 65.81 108.78 229.00 19.20
North Carolina 19 1,429.13 1,365.18 - 235.68 155.29 63.95
North Dakota 3 571.13 571.13 - - - -
Ohio 21 1,726.40 1,572.35 - 35 - 154.05
Oklahoma 7 936.06 930.16 - 120.65 - 5.9
Oregon 6 727.41 727.41 - 6.89 - -
Pennsylvania 22 1,952.98 1,862.21 - 138.84 92.74 90.77
Puerto Rico 3 249.77 249.77 - 249.77 - -
Rhode Island 3 68.53 68.53 - - - -
South Carolina 10 846.58 846.58 - 71.2 - -
South Dakota 4 678.31 678.31 - - - -
Tennessee 17 1,237.59 1,200.79 - 66.62 - 36.80
Texas 25 3,603.18 3,503.84 - 69.53 223.40 99.34
Utah 5 976.09 936.8 - - - 39.29
Vermont 4 320.22 320.22 - - - -
Virginia 16 1,156.43 1,117.23 - 45.28 - 39.2
Washington 7 763.67 763.67 - - - -
West Virginia 7 612.93 549.05 - 32.06 - 63.88
Wisconsin 7 833.56 741.8 - 167 - 91.76
Wyoming 4 913.6 913.6 - - - -
Totals: 534 49,861.78 48,614.93 402.83 3,732.65 1,492.42 1,246.85
Updated: 1/27/2022
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