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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 RouteTotal MilesNet MilesHoward-Cramer Miles Sections 103(c)(4)(A) Miles ISTEA Miles Overlap Miles &Route
AlabamaI-1066.3166.31-----
I-20214.784.6---130.1I-59
I-2293.693.6--93.6--
I-59241.36241.36-----
I-65367367-----
I-858080-----
I-1654.94.9-----
I-3592.32.3-----
I-45932.832.8-----
I-56521.421.4-----
I-685140---14I-85
I-7594.54.5-----
12 Routes1,142.87998.77--93.60144.10-
AlaskaA-1408.23408.23-408.23---
A-2202.18202.18-202.18---
A-3148.12148.12-148.12---
A-4323.69323.69-323.69---
4 Routes1,082.221,082.22-1,082.22-- 
ArizonaI-8178.33178.33-----
I-10392.33392.33-----
I-1529.3929.39-----
I-17145.76145.76-----
I-1963.3563.35-----
I-40359.48359.48-----
6 Routes1,168.641,168.64-----
ArkansasI-30143.02143.02-----
I-40284.69284.69-----
I-5572.2270---2.22I-40
I-43012.9312.93-----
I-4409.969.96-9.96---
I-53046.6546.65-46.65---
I-54072.6772.67-5.9766.67--
I-6307.47.4-----
8 Routes649.54647.32-62.5866.672.22-
CaliforniaI-5796.53796.53-----
I-8169.92169.92-----
I-10242.54240.94---1.6I-5
I-15287.26287.26-----
I-40154.61154.61-----
I-80199.24199.24-----
I-10517.3217.327----
I-11020.4320.43-----
I-20512.9712.97-----
I-21048.7248.72-----
I-21554.554.5-54.5---
I-2382.232.23-2.23---
I-28057.2257.22-----
I-3058.448.44-----
I-3803.33.3-----
I-40572.1572.15-----
I-50532.9832.98-----
I-58075.6375.63-7.3---
I-60527.427.4-----
I-68070.5270.52-12.5---
I-71019.6619.66-19.66---
I-7806.56.5-----
I-80528.0228.02-----
I-88047.2247.22-47.22---
I-9802.032.03-1---
25 Routes2,457.342,455.747144.41-1.6 
ColoradoI-25299.7299.7-----
I-70451.04451.04-----
I-76184.86184.86-----
I-2251212-----
I-2705.315.31-----
5 Routes952.91952.91-----
ConnecticutI-8497.997.9-----
I-915858-----
I-95111.57111.57-----
I-2916.026.02-----
I-3848.28.2-----
I-39554.6954.69-54.69---
I-6841.411.41-----
I-6918.388.386.69----
8 Routes346.17346.176.6954.69---
DelawareI-9523.4323.43-----
I-2955.715.71-----
I-49511.4711.47-----
3 Routes40.6140.61-----
District of ColumbiaI-661.481.48-----
I-950.110.11-----
I-2955.25.2-----
I-3953.483.48-----
I-69522-----
5 Routes12.2712.27-----
FloridaI-4132.3132.3-----
I-10362.28362.28-----
I-75470.88470.8846.31----
I-95382.15382.15-----
I-1106.946.94-----
I-1751.441.44-1.44---
I-1954.424.42-----
I-27560.6460.64-----
I-29561.0461.04-25.53---
I-3751.341.34-1.34---
I-3951.291.29-----
I-59512.8612.86-8.8---
12 Routes1,497.581,497.5846.3137.11---
GeorgiaI-16166.81166.81-----
I-20202.61202.61-----
I-244.14.1-----
I-5920.6720.67-----
I-75355.11355.11-----
I-85179.9171.9---8I-75
I-95112112-----
I-18549.349.3-5.5---
I-28563.9862.77---1.21I-85
I-47515.8315.83-----
I-5166.496.49-6.49---
I-52010.3410.349.11----
I-57530.9730.9729.16----
I-67511.0411.047.78----
I-98524.0424.04-24.04---
15 Routes1,253.191,243.9846.0536.03-9.21 
HawaiiH-127.1627.16-----
H-28.338.33-----
H-315.3215.32-----
H-2014.14.1-4.1---
4 Routes54.9154.91-4.1---
IdahoI-15196196-----
I-84275.74275.74-----
I-8662.8562.85-----
I-9073.5573.55-----
I-1843.623.62-----
5 Routes611.76611.76-----
IllinoisI-2438.7338.73-----
I-39123.42123.42-123.42---
I-55313.08294.38---18.7I-70
I-57364.16358.57---5.59I-70
I-64128.12123.98---4.14I-57
I-70135.94135.94-----
I-72177.25177.25-99.1---
I-74220.34214.45---5.89I-55
I-80163.52163.52-----
I-88140.6140.6-140.6---
I-90123.89108.5-16.71-15.39I-94
I-9461.5359.05---2.48I-80
I-15532.1332.13-32.13---
I-17219.6919.69-19.69---
I-18013.1913.19-----
I-1903.073.07-3.07---
I-25527.0527.05-----
I-27014.9714.97-----
I-28017.68.21---9.39I-74
I-29029.8429.84-----
I-29453.4248.1---5.32I-80
I-35532.5132.51-32.51---
I-47414.8814.88-----
23 Routes2,248.932,182.03-467.23-66.90-
IndianaI-64123.33123.33-----
I-65261.27261.27-----
I-69246.77246.77--68.77--
I-70156.6154.47---2.13I-65
I-74171.54150.94---20.6I-465
I-80151.56151.56-----
I-90156.2820.68---135.6I-80
I-9446.1330.08---16.05I-80
I-16421.2421.24-----
I-2656.736.73-----
I-2753.163.16-----
I-46557.5157.51-5.03---
I-46930.8330.83-30.83---
13 Routes1,432.951,258.57-35.86-174.38-
IowaI-29154.75151.75---3I-80
I-35218.33218.33-----
I-745.365.36-----
I-80303.23288.94---14.29I-35
I-1290.270.27-----
I-23513.7813.78-----
I-2809.389.38-----
I-38073.0573.05-----
I-4800.750.75-----
I-68029.5419.63---9.91I-29
10 Routes808.44781.24---27.2-
KansasI-35235.51235.51-----
I-70424.15424.15-----
I-13595.7495.74-----
I-23516.5216.52-----
I-33550.1350.13-50.13---
I-43528.0328.03-----
I-47013.7213.72-----
I-6358.98.9-----
I-6701.641.64-----
9 Routes874.34874.34-50.13---
KentuckyI-2493.3793.37-----
I-64185.2185.2-----
I-65137.32137.32-----
I-693838--38--
I-7197.4277.72---19.7I-75
I-75191.78191.78-----
I-26422.9322.93-----
I-26524.4824.48-21.2---
I-27524.5824.58-----
I-4715.025.02-----
10 Routes820.1800.4-21.23819.7-
LouisianaI-10274.42274.42-----
I-1285.5985.59-----
I-20189.87189.87-----
I-49208.25208.25153.1819.55---
I-5565.8165.81-----
I-5911.4811.48-----
I-1108.898.89-----
I-21012.412.4-----
I-22017.6217.62-----
I-31011.2511.25-----
I-5103.043.04-----
I-6104.524.52-----
I-9109.79.7--9.7--
13 Routes902.84902.84153.1819.559.7--
MaineI-95298.51298.51-----
I-1951.551.55-----
I-29511.0211.02-----
I-3954.994.99-----
I-49550.4750.47-50.47---
5 Routes366.54366.54-50.47---
MarylandI-6881.0981.09-81.09---
I-7093.6293.62-----
I-8112.0812.08-----
I-8334.534.5-----
I-95110.01110.01-----
I-9717.6217.6214.9----
I-1954.714.712.21.4---
I-27034.434.4-----
I-2950.80.8-----
I-3702.542.541.18----
I-3951.981.98-----
I-49516.1316.13-----
I-59519.9719.9719.31----
I-69530.5730.57-2.2---
I-7958.998.99-5.47---
I-89511.4411.44-----
16 Routes480.45480.4537.5990.16---
MassachusettsI-848.158.15-----
I-90135.72135.72-2.9---
I-9154.9954.99-----
I-9347.0747.07-14.1---
I-9591.9591.95-37.54---
I-19019.2619.26-----
I-19540.7340.73-14.28---
I-29020.1620.16-----
I-2915.445.44-----
I-2954.234.23-----
I-3914.464.46-----
I-39511.9111.91-11.91---
I-495121.56121.5612.918.5---
13 Routes565.63565.6312.999.23---
MichiganI-69198.51193.31-66.8-5.2I-96
I-75395.54395.54-----
I-94275.49275.49-----
I-96192.06192.06-----
I-1943.383.38-----
I-19680.6580.65-----
I-27529.9729.97-----
I-2963.433.43-----
I-3751.061.06-----
I-47516.9916.99-----
I-49611.7811.78-----
I-6757.727.72-----
I-69629.3929.39-----
13 Routes1,245.971,240.77-66.8-5.2-
MinnesotaI-35259.69220.46---39.23I-35E
I-35E39.3439.34-----
I-35W41.7841.78-----
I-90275.7275.7-----
I-94259.49259.22---0.27I-35E
I-3949.759.75-----
I-49442.9442.94-----
I-5351.571.57-----
I-69422.6221.97---0.65I-35E
9 Routes952.88912.73---40.15-
MississippiI-1077.1977.19-----
I-20154.61129.41---25.2I-55/59
I-2231.131.1--31.1--
I-55290.41290.41-----
I-59171.72171.72-----
I-6923.914.7  14.79.2I-55
I-1104.14.1-----
I-22012.0112.01-----
8 Routes765.04730.64--45.834.4-
MissouriI-29130.72125.22---5.5I-35/40
I-35114.74113.74---1I-70
I-44290.49290.49-----
I-49178.96178.96--178.96--
I-55210.45209.45---1I-44
I-5721.9621.96-----
I-6440.540.5-40.5---
I-70251.66251.66-----
I-722.042.04-2.04---
I-15510.8410.84-----
I-17011.1711.17-4.29---
I-22914.9714.97-----
I-2553.773.77-----
I-27035.6235.62-----
I-43552.7852.78-----
I-47016.7216.72-----
I-6353.773.77-----
I-6701.171.17-----
18 Routes1,392.331,384.83-46.83178.967.50-
MontanaI-15396.03396.03-----
I-90551.68544.03---7.65I-15
I-94249.15249.15-----
I-1151.191.19-----
I-3150.830.83-----
5 Routes1,198.881,191.230007.65-
NebraskaI-762.482.48-----
I-80455.32455.32-----
I-1293.213.21-----
I-1803.183.18-----
I-4804.154.15-----
I-68013.3213.32-----
6 Routes481.66481.66-----
NevadaI-15123.77123.77-----
I-80410.67410.67-----
I-21511.111.1-11.1---
I-51520.5420.54-14.9---
I-58030.06730.067-26.287---
5 Routes596.147596.147-52.287---
New HampshireI-8960.8760.87-----
I-93131.78131.78-----
I-9516.1116.11-----
I-29311.1811.18-5.68---
I-3934.64.6-----
5 Routes224.54224.54-5.68-- 
New JerseyI-763.043.04-----
I-7867.8367.83-----
I-8068.3568.35-----
I-9597.7697.76-----
I-19534.1734.1727.3----
I-27822-----
I-28017.8517.85-----
I-28767.5467.54-----
I-29568.0668.06-----
I-6764.754.75-----
10 Routes431.36431.3627.3----
New MexicoI-10164.27164.27-----
I-25462.12462.12-----
I-40373.51373.51-----
3 Routes999.9999.9---- 
New YorkI-780.50.5-----
I-81183.6183.6-----
I-8471.7971.79-----
I-86216.4216.4--216.4--
I-87333.49333.49-29.8---
I-88117.75117.75-----
I-90385.48385.48-----
I-9523.523.5-----
I-19028.3428.34-----
I-27833.6233.62-----
I-28731.1811.98---19.2I-87
I-2909.89.8-----
I-2959.19.1-----
I-39076.0676.0660.5----
I-4782.142.14-2.14---
I-48115.0415.04-----
I-49037.437.4-----
I-49566.3866.38-62.7---
I-5871.211.21-----
I-5905.315.315.31----
I-67814.3314.33-7.8---
I-68427.0627.06-----
I-69014.1914.19-----
I-78710.1610.16-----
I-7902.412.41-----
I-8780.70.7-----
I-8909.359.35-----
I-8951.121.12-----
I-9906.356.35-2.04---
30 Routes1,733.761,714.5665.81104.48200.619.2-
North CarolinaI-2653.6753.67-13.75---
I-40419.4419.4-91.4---
I-7376.5276.52--76.523.56I-840
I-7469.6153.35--69.6116.26I-73
I-77102.31102.31-5.8---
I-85231.23199.72---31.51I-40
I-95181.71181.71-----
I-1406.86.8-6.8---
I-2409.149.14-6.92---
I-2774.414.41-1.72---
I-44016.416.4-16.4---
I-48559.5559.55-59.55---
I-4954.094.09-4.09---
I-54027.327.3-27.3---
I-7852.21----2,21I-840
I-79525.425.4---  
I-8405.772.21---5.77I-73, I-785
17 Routes1295.521241.98-233.73146.1357.1 
North DakotaI-29217.54217.54-----
I-94352.39352.39-----
I-1941.21.2-----
3 Routes571.13571.13-----
OhioI-70225.6225.6-----
I-71248.15246.19---1.96I-75/70
I-7419.4719.47-----
I-75211.3211.3-----
I-7681.6581.65-----
I-77160.13160.13-----
I-80237.48237.48-35---
I-90244.75101.95---142.8I-80
I-27054.9754.97-----
I-27146.0640.22---5.84I-480
I-27555.9752.52---3.45I-74
I-2774.144.14-----
I-28012.4112.41-----
I-4706.696.69-----
I-4710.730.73-----
I-47520.3720.37-----
I-48041.7741.77-----
I-4902.432.43-----
I-6709.379.37-----
I-67526.5326.53-----
I-68016.4316.43-----
21 Routes1,726.401,572.35-35-154.05 
OklahomaI-35235.96235.96-----
I-40331.73330.2---1.53I-35
I-44328.53324.16-114.76-4.37I-35
I-2355.365.36-1.54---
I-24016.2216.22-4.35---
I-24415.7515.75-----
I-4442.512.51-----
7 Routes936.06930.16-120.65-5.9-
OregonI-5308.14308.14-----
I-8211.0111.01-----
I-84375.17375.17-6.89---
I-1053.493.49-----
I-20526.0726.07-----
I-4053.533.53-----
6 Routes727.41727.41-6.89---
PennsylvaniaI-70167.9280.7---87.22I-76
I-76349.67349.67-----
I-7875.2375.23-----
I-79182.72179.17---3.55I-70
I-80311.07311.07-----
I-81232.63232.63-----
I-8350.850.8-----
I-8454.5554.55-----
I-866.996.99--6.99--
I-9046.446.4-----
I-9551.0851.08-----
I-998888--88--
I-17611.3311.33-----
I-18028.8528.85-28.85---
I-27632.6532.65-----
I-27919.5219.52-----
I-2832.912.91-----
I-37678.778.7-----
I-38024.7624.76-----
I-476129.61129.61-110---
I-5791.571.57-----
I-6762.152.15-----
22 Routes1,949.111,858.34-138.8594.9990.77-
Puerto RicoPRI-171.0871.08-71.08---
PRI-2138.13138.13-138.13---
PRI-340.5640.56-40.56---
3 Routes249.77249.77-249.77---
Rhode IslandI-9542.3642.36-----
I-1953.823.82-----
I-29522.3522.35-----
3 Routes68.5368.53-----
South CarolinaI-20141.51141.51-----
I-26220.95220.95-----
I-7791.0591.05-9.5---
I-85106.28106.28-----
I-95198.76198.76-----
I-1263.683.68-----
I-18517.717.7-14.5---
I-38542.1642.16-36---
I-5207.27.2-----
I-52619.2619.26-11.2---
I-5852.252.25-----
11 Routes850.8850.8-71.2-- 
South DakotaI-29252.5252.5-----
I-90412.76412.76-----
I-1901.721.72-----
I-22911.3311.33-----
4 Routes678.31678.31-----
TennesseeI-24180.16177.96---2.2I-40/65
I-263131-31---
I-40455.28455.28-----
I-5512.2812.28-----
I-65121.71120.71---1I-40
I-6914850.8---14I-55,I-240, I-40
I-75161.86142.26---19.6I-40
I-8175.6675.66-----
I-1241.971.97-----
I-14011.1711.17-11.17---
I-15515.9315.93-----
I-1818.48.4-8.4---
I-24019.2719.27-----
I-2752.982.98-----
I-4407.647.64-----
I-6407.037.03-----
16 Routes1,126.341,940.34-50.57-36.80-
TexasI-246.846.8-----
I-10881878.61---2.39I-35
I-20636.08636.08-2---
I-27124.13124.13-12.9---
I-30223.74223.74-29.93---
I-35504.15407.2---96.95I-35E
I-35E96.7696.76-----
I-35W85.285.2-----
I-37143143-----
I-40177.1177.1-----
I-4414.7714.77-14.77---
I-45284.91284.91-----
I-6976.276.2--76.2--
I-69C13.513.5--13.5--
I-69E59.559.5--59.5--
I-1100.920.92-----
I-3451.41.4-----
I-3693.53.5--3.5--
I-41049.4949.49-9.93---
I-61037.9737.97-----
I-6353737-----
I-82035.1735.17-----
22 Routes3,532.293,432.95-69.53152.7099.34-
UtahI-15401.07401.07-----
I-70232.15232.15-----
I-80196.34193.03---3.31I-15
I-84118.7182.73---35.98I-15
I-21529.0229.02-----
5 Routes977.29938---39.29-
VermontI-89130.25130.25-----
I-91177.38177.38-----
I-9311.111.1-----
I-1891.491.49-----
4 Routes320.22320.22-----
VirginiaI-64297.62267.22---30.4I-81
I-6674.874.8-----
I-7769.460.6---8.8I-81
I-81324.92324.92-----
I-8568.6468.64-----
I-95178.73178.73-24.08---
I-1953.243.24-----
I-26425.0725.07-12---
I-29552.5652.56-----
I-3811.671.67-----
I-3959.919.91-----
I-4644.714.71-----
I-49515.2815.28-----
I-5643.033.03-----
I-5816.646.64-----
I-66420.2120.21-9.2---
16 Routes1,156.431,117.23-45.28-39.2-
WashingtonI-5276.62276.62-----
I-82132.57132.57-----
I-90296.92296.92-----
I-18215.1915.19-----
I-20510.5710.57-----
I-40530.330.3-----
I-7051.51.5-----
7 Routes763.67763.67-----
West VirginiaI-64188.75124.87---63.88I-77
I-6832.0632.06-32.06---
I-7014.4514.45-----
I-77187.21187.21-----
I-79160.52160.52-----
I-812626-----
I-4703.943.94-----
7 Routes612.93549.05-32.06-63.88-
WisconsinI-39182.72182.72-104---
I-43191.55191.55-63---
I-90108.61108.61-----
I-94341.02249.26---91.76I-90
I-5351.211.21-----
I-7943.753.75-----
I-8944.74.7-----
7 Routes833.56741.8-167-91.76-
WyomingI-25300.95300.95-----
I-80402.76402.76-----
I-90208.8208.8-----
I-1801.091.09-----
4 Routes913.6913.6-----

Note:

Total Miles - this column includes the original 42,500 miles under former 23 USC 103(e)(1) & (3) plus the Howard-Cramer additions under former 23 USC 103(e)(2) and additions under 23 USC 103(c)(4)(A) and high priority routes per 1991 ISTEA. It also includes mileage sections which overlap other Interstate routes.

Net Miles - this column does not include overlapping mileage.

Howard-Cramer Miles - this column shows mileage added to the system under former 23 USC 103(e)(2).

Section 103(c)(4)(A) Miles - this column shows mileage added to the system under 23 USAC 103(c)(4)(A).

It supersedes 23 USC 139(a) & 139(c).

ISTEA Miles - this column shows the miles added under Sec. 1105(e)(5), ISTEA.

Overlap Miles - mileage shown in this column is included in the Total Length of each overlapped route.

Routes shown are those routes designated as of December 31, 2013

Summary: As of December 31, 2013
State Number of Interstate Routes Total Miles Net MilesHoward-Cramer Miles Section 103(e)(4)(A) Miles ISTEA Miles Overlap Miles
Alabama121,142.87998.77--93.60144.10
Alaska41,082.221,082.22-1,082.22--
Arizona61,168.641,168.64----
Arkansas7649.54647.32-62.5866.672.22
California252,457.342,455.747144.41-1.6
Colorado5952.91952.91----
Connecticut8346.17346.176.6954.69--
Delaware340.6140.61----
District of Columbia512.2712.27----
Florida121,497.581,497.5846.3137.11--
Georgia151,253.191,243.9846.0536.03-9.21
Hawaii454.9154.91-4.1--
Idaho5611.76611.76----
Illinois232,248.932,182.03-467.23-66.90
Indiana131,432.951,258.57-35.86-174.38
Iowa10808.44781.24---27.2
Kansas9874.34874.34050.13--
Kentucky10820.1800.4-21.23819.7
Louisiana13902.84902.84153.1819.559.7-
Maine5366.54366.54-50.47--
Maryland16481.04481.0437.5990.16--
Massachusetts13565.63565.6312.999.23--
Michigan131,245.971,240.77-66.8-5.2
Minnesota9952.88912.73---40.15
Mississippi8765.04730.64--45.834.4
Missouri181,392.331,384.83-46.83178.967.50
Montana51,198.881,191.23---7.65
Nebraska6481.66481.66----
Nevada5596.147596.147-52.287--
North Hampshire5224.54224.54-5.68--
New Jersey10431.36431.3627.3---
New Mexico3999.9999.9----
New York301,733.761,714.5665.81104.48200.6019.20
North Carolina171,295.521,241.98-233.73146.1357.10
North Dakota3571.13571.13----
Ohio211,726.401,572.35-35-154.05
Oklahoma7936.06930.16-120.65-5.9
Oregon6727.41727.41-6.89--
Pennsylvania221,949.111,858.34-138.8594.9990.77
Puerto Rico3249.77249.77-249.77--
Rhode Island368.5368.53----
South Carolina10846.58846.58-71.2--
South Dakota4678.31678.31----
Tennessee161,126.341,940.34-50.57-36.80
Texas183,532.293,432.95-69.53152.7099.34
Utah5977.29938---39.29
Vermont4320.22320.22----
Virginia161,156.431,117.23-45.28-39.2
Washington7763.67763.67----
West Virginia7612.93549.05-32.06-63.88
Wisconsin7833.56741.8-167-91.76
Wyoming4913.6913.6----
Totals:515 49,078.437 48,695.297 402.83 3,751.577 1,027.15 1,237.5
Updated: 01/15/2014
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