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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
AlabamaI-1066.3166.31-----
I-20214.7084.60---130.10I-59
I-59241.36241.36-----
I-65367.00367.00-----
I-8580.0080.00-----
I-1654.904.90-----
I-3592.302.30-----
I-45932.8032.80-----
I-56521.4021.40-----
I-7594.504.50-----
10 Routes1,035.27905.170.000.000.00130.10 
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 Routes1,082.221,082.220.001,082.220.000.00 
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 Routes1,168.641,168.640.000.000.000.00 
ArkansasI-30143.02143.02-----
I-40284.69284.69-----
I-5572.2270.00---2.22I-40
I-43012.9312.93-----
I-4409.969.96-9.96---
I-53046.6546.65-46.65---
I-54080.7280.72-5.9766.70--
I-6307.407.40-----
8 Routes657.59655.370.0062.5866.702.22 
CaliforniaI-5796.53796.53-----
I-8169.92169.92-----
I-10242.54240.94---1.60I-5
I-15287.26287.26-----
I-40154.61154.61-----
I-80199.24199.24-----
I-10517.3217.327.00----
I-11020.4320.43-----
I-20512.9712.97-----
I-21048.7248.72-----
I-21554.5054.50-54.50---
I-2382.232.23-2.23---
I-28057.2257.22-----
I-3058.448.44-----
I-3803.303.30-----
I-40572.1572.15-----
I-50532.9832.98-----
I-58075.6375.63-7.30---
I-60527.4027.40-----
I-68070.5270.52-12.50---
I-71019.6619.66-19.66---
I-7806.506.50-----
I-80528.0228.02-----
I-88047.2247.22-47.22---
I-9802.032.03-1.00---
25 Routes2,457.342,455.747.00144.410.001.60 
ColoradoI-25299.70299.70-----
I-70451.04451.04-----
I-76184.86184.86-----
I-22512.0012.00-----
I-2705.315.31-----
5 Routes952.91952.910.000.000.000.00 
ConnecticutI-8497.9097.90-----
I-9158.0058.00-----
I-95111.57111.57-----
I-2916.026.02-----
I-3848.208.20-----
I-39554.6954.69-54.69---
I-6841.411.41-----
I-6918.388.386.69----
8 Routes346.17346.176.6954.690.000.00 
DelawareI-9523.4323.43-----
I-2955.715.71-----
I-49511.4711.47-----
3 Routes40.6140.610.000.000.000.00 
District of ColumbiaI-661.481.48-----
I-950.110.11-----
I-2957.257.25-----
I-3953.483.48-----
I-6951.391.39-----
5 Routes13.7113.710.000.000.000.00 
FloridaI-4132.30132.30-----
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-29535.5135.51-----
I-3751.341.34-1.34---
I-3951.291.29-----
I-59512.8612.86-8.80---
12 Routes1,472.051,472.0546.3111.580.000.00 
GeorgiaI-16166.81166.81-----
I-20202.61202.61-----
I-244.104.10-----
I-5920.6720.67-----
I-75355.11355.11-----
I-85179.90171.90---8.00I-75
I-95112.00112.00-----
I-18549.3049.30-5.50---
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 Routes1,253.191,243.9846.0536.030.009.21 
HawaiiH-127.1627.16-----
H-28.338.33-----
H-315.3215.32-----
H-2014.104.10-4.10---
4 Routes54.9154.910.004.100.000.00 
IdahoI-15196.00196.00-----
I-84275.74275.74-----
I-8662.8562.85-----
I-9073.5573.55-----
I-1843.623.62-----
5 Routes611.76611.760.000.000.000.00 
IllinoisI-2438.7338.73-----
I-39123.42123.42-123.42---
I-55313.08294.38---18.70I-70
I-57364.16358.57---5.59I-70
I-64128.12123.98---4.14I-57
I-70135.94135.94-----
I-72177.25177.25-99.10---
I-74220.34214.45---5.89I-55
I-80163.52163.52-----
I-88140.60140.60-140.60---
I-90123.89108.50-16.71-15.39I-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-28017.608.21---9.39I-74
I-29029.8429.84-----
I-29453.4248.10---5.32I-80
I-35520.0120.01-20.01---
I-47414.8814.88-----
23 Routes2,236.432,169.530.00454.730.0066.90 
IndianaI-64123.33123.33-----
I-65261.27261.27-----
I-69157.30157.30-----
I-70156.60154.47---2.13I-65
I-74171.54150.94---20.60I-465
I-80151.56151.56-----
I-90156.2820.68---135.60I-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 Routes1,343.481,169.100.0035.860.00174.38 
IowaI-29154.75151.75---3.00I-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 Routes808.44781.240.000.000.0027.20 
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-6358.908.90-----
I-6701.641.64-----
9 Routes874.34874.340.0050.130.000.00 
KentuckyI-2493.3793.37-----
I-64185.20185.20-----
I-65137.32137.32-----
I-7197.4277.72---19.70I-75
I-75191.78191.78-----
I-26422.9322.93-----
I-26524.4824.48-21.20---
I-27524.5824.58-----
I-4715.025.02-----
9 Routes782.10762.400.0021.200.0019.70 
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-21012.4012.40-----
I-22017.6217.62-----
I-31011.2511.25-----
I-5103.043.04-----
I-6104.524.52-----
I-9109.709.70--9.70--
13 Routes902.84902.84153.1819.559.700.00 
MaineI-95298.51298.51-----
I-1951.551.55-----
I-29511.0211.02-----
I-3954.994.99-----
I-49550.4750.47-50.47---
5 Routes366.54366.540.0050.470.000.00 
MarylandI-6881.0981.09-81.09---
I-7093.6293.62-----
I-8112.0812.08-----
I-8334.5034.50-----
I-95110.01110.01-----
I-9717.6217.6214.90----
I-1954.714.712.201.40---
I-27034.4034.40-----
I-2950.800.80-----
I-3703.133.131.18----
I-3951.981.98-----
I-49516.1316.13-----
I-59519.9719.9719.31----
I-69530.5730.57-2.20---
I-7958.998.99-5.47---
I-89511.4411.44-----
16 Routes481.04481.0437.5990.160.000.00 
MassachusettsI-848.158.15-----
I-90135.72135.72-2.90---
I-9154.9954.99-----
I-9347.0747.07-14.10---
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-495121.56121.5612.9018.50---
13 Routes565.63565.6312.9099.230.000.00 
MichiganI-69198.51193.31-66.80-5.20I-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 Routes1,245.971,240.770.0066.800.005.20 
MinnesotaI-35259.69220.46---39.23I-35E
I-35E39.3439.34-----
I-35W41.7841.78-----
I-90275.70275.70-----
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 Routes952.88912.730.000.000.0040.15 
MississippiI-1077.1977.19-----
I-20154.61129.41---25.20I-55/59
I-55290.41290.41-----
I-59171.72171.72-----
I-1104.104.10-----
I-22012.0112.01-----
6 Routes710.04684.840.000.000.0025.20 
MissouriI-29130.72125.22---5.50I-35/40
I-35114.74113.74---1.00I-70
I-44290.49290.49-----
I-55210.45209.45---1.00I-44
I-5721.9621.96-----
I-6414.6914.69-14.69---
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-----
17 Routes1,187.561,180.060.0021.020.007.50 
MontanaI-15396.03396.03-----
I-90551.68544.03---7.65I-15
I-94249.15249.15-----
I-1151.191.19-----
I-3150.830.83-----
5 Routes1,198.881,191.230.000.000.007.65 
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 Routes481.66481.660000 
NevadaI-15123.77123.77-----
I-80410.67410.67-----
I-51520.5420.54-14.90---
I-5804.994.99-1.21---
4 Routes559.97559.97016.1100 
New HampshireI-8960.8760.87-----
I-93131.78131.78-----
I-9516.1116.11-----
I-29311.1811.18-5.68---
I-3934.604.60-----
5 Routes224.54224.540.005.680.000.00 
New JerseyI-763.043.04-----
I-7867.8367.83-----
I-8068.3568.35-----
I-9597.7697.76-----
I-19534.1734.1727.30----
I-2782.002.00-----
I-28017.8517.85-----
I-28767.5467.54-----
I-29568.0668.06-----
I-6764.754.75-----
10 Routes431.36431.3627.300.000.000.00 
New MexicoI-10164.27164.27-----
I-25462.12462.12-----
I-40373.51373.51-----
3 Routes999.90999.900.000.000.000.00 
New YorkI-780.500.50-----
I-81183.60183.60-----
I-8471.7971.79-----
I-86176.57176.57--176.57--
I-87333.49333.49-29.80---
I-88117.75117.75-----
I-90385.48385.48-----
I-9523.5023.50-----
I-19028.3428.34-----
I-27833.6233.62-----
I-28731.1811.98---19.20I-87
I-2909.809.80-----
I-2959.109.10-----
I-39076.0676.0660.50----
I-4782.142.14-2.14---
I-48115.0415.04-----
I-49037.4037.40-----
I-49566.3866.38-62.70---
I-5871.211.21-----
I-5905.315.315.31----
I-67814.3314.33-7.80---
I-68427.0627.06-----
I-69014.1914.19-----
I-78710.1610.16-----
I-7902.412.41-----
I-8780.700.70-----
I-8909.359.35-----
I-8951.121.12-----
I-9906.356.35-2.04---
29 Routes1,693.931,674.7365.81104.48176.5719.20 
North CarolinaI-2639.9239.92-----
I-40419.40419.40-91.40---
I-7312.2712.27--12.27--
I-7412.1012.10--12.10--
I-77102.31102.31-5.80---
I-85233.93195.42---38.51I-40
I-95181.71181.71-----
I-2409.149.14-6.92---
I-2774.414.41-1.72---
I-44016.4016.40-16.40---
I-48516.7016.70-16.70---
I-5405.005.00-5.00---
12 Routes1,053.291,014.780.00143.9424.3738.51 
North DakotaI-29217.54217.54-----
I-94352.39352.39-----
I-1941.201.20-----
3 Routes571.13571.130.000.000.000.00 
OhioI-70225.60225.60-----
I-71248.15246.19---1.96I-75/70
I-7419.4719.47-----
I-75211.30211.30-----
I-7681.6581.65-----
I-77160.13160.13-----
I-80237.48237.48-35.00---
I-90244.75101.95---142.80I-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 Routes1,726.401,572.350.0035.000.00154.05 
OklahomaI-35235.96235.96-----
I-40331.03329.50---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 Routes935.36929.460.00120.650.005.90 
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 Routes727.41727.410.006.890.000.00 
PennsylvaniaI-70167.9280.70---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-8350.8050.80-----
I-8454.5554.55-----
I-866.996.99--6.99--
I-9046.4046.40-----
I-9551.0851.08-----
I-9953.0053.00--53.00--
I-17611.3311.33-----
I-18028.8528.85-28.85---
I-27632.6532.65-----
I-27919.5219.52-----
I-2832.912.91-----
I-37614.7014.70-----
I-38024.7624.76-----
I-476129.61129.61-110.00---
I-5791.571.57-----
I-6762.152.15-----
22 Routes1,850.111,759.340.00138.8559.9990.77 
Puerto RicoPRI-171.0871.08-71.08---
PRI-2138.13138.13-138.13---
PRI-340.5640.56-40.56---
3 Routes249.77249.770.00249.770.000.00 
Rhode IslandI-9542.3642.36-----
I-1953.823.82-----
I-29522.3522.35-----
3 Routes68.5368.530.000.000.000.00 
South CarolinaI-20141.51141.51-----
I-26220.95220.95-----
I-7791.0591.05-9.50---
I-85106.28106.28-----
I-95198.76198.76-----
I-1263.683.68-----
I-18517.7017.70-14.50---
I-38542.1642.16-36.00---
I-52619.2619.26-11.20---
I-5852.252.25-----
10 Routes846.58846.580.0071.200.000.00 
South DakotaI-29252.50252.50-----
I-90412.76412.76-----
I-1901.721.72-----
I-22911.3311.33-----
4 Routes678.31678.310.000.000.000.00 
TennesseeI-24180.16177.96---2.20I-40/65
I-40455.28455.28-----
I-5512.2812.28-----
I-65121.71120.71---1.00I-40
I-75161.86142.26---19.60I-40
I-8175.6675.66-----
I-1241.971.97-----
I-14011.1711.17-11.17---
I-15515.9315.93-----
I-18123.8523.85-23.85---
I-24019.2719.27-----
I-2752.982.98-----
I-4407.647.64-----
I-6407.037.03-----
14 Routes1,096.791,073.990.0035.020.0022.80 
TexasI-10881.00878.61---2.39I-35
I-20636.08636.08-2.00---
I-27124.13124.13-12.90---
I-30223.74223.74-29.93---
I-35504.15407.20---96.95I-35E
I-35E96.7696.76-----
I-35W85.2085.20-----
I-37143.00143.00-----
I-40177.10177.10-----
I-4414.7714.77-14.77---
I-45284.91284.91-----
I-1100.920.92-----
I-3451.401.40-----
I-41049.4949.49-9.93---
I-61037.9737.97-----
I-63537.0037.00-----
I-82035.1735.17-----
17 Routes3,332.793,233.450.0069.530.0099.34 
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 Routes977.29938.000.000.000.0039.29 
VermontI-89130.25130.25-----
I-91177.38177.38-----
I-9311.1011.10-----
I-1891.491.49-----
4 Routes320.22320.220.000.000.000.00 
VirginiaI-64297.62267.22---30.40I-81
I-6674.8074.80-----
I-7769.4060.60---8.80I-81
I-81324.92324.92-----
I-8568.6468.64-----
I-95178.73178.73-24.08---
I-1953.243.24-----
I-26425.0725.07-12.00---
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-66420.2120.21-9.20---
16 Routes1,156.431,117.230.0045.280.0039.20 
WashingtonI-5276.62276.62-----
I-82132.57132.57-----
I-90296.92296.92-----
I-18215.1915.19-----
I-20510.5710.57-----
I-40530.3030.30-----
I-7051.501.50-----
7 Routes763.67763.670.000.000.000.00 
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-8126.0026.00-----
I-4703.943.94-----
7 Routes612.93549.050.0032.060.0063.88 
WisconsinI-39182.72182.72-104.00---
I-43191.55191.55-63.00---
I-90108.61108.61-----
I-94341.02249.26---91.76I-90
I-5351.211.21-----
I-7943.753.75-----
I-8944.704.70-----
7 Routes833.56741.800.00167.000.0091.76 
WyomingI-25300.95300.95-----
I-80402.76402.76-----
I-90208.80208.80-----
I-1801.091.09-----
4 Routes913.60913.600.000.000.000.00 

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 October 31, 200
Summary: As of October 31, 2002
State Number of
Interstate
Routes
Total
Miles
Net
Miles
Howard-
Cramer
Miles
Section
103(e)(4)(A)
Miles
ISTEA
Miles
Overlap
Miles
Alabama101,035.27905.170.000.000.00130.10
Alaska41,082.221,082.220.001,082.220.000.00
Arizona61,168.641,168.640.000.000.000.00
Arkansas7657.59655.370.0062.5866.702.22
California252,457.342,455.747.00144.410.001.60
Colorado5952.91952.910.000.000.000.00
Connecticut8346.17346.176.6954.690.000.00
Delaware340.6140.610.000.000.000.00
District of Columbia513.7113.710.000.000.000.00
Florida121,472.051,472.0546.3111.580.000.00
Georgia151,253.191,243.9846.0536.030.009.21
Hawaii454.9154.910.004.100.000.00
Idaho5611.76611.760.000.000.000.00
Illinois232,236.432,169.530.00454.730.0066.90
Indiana131,343.481,169.100.0035.860.00174.38
Iowa10808.44781.240.000.000.0027.20
Kansas9874.34874.340.0050.130.000.00
Kentucky9782.10762.400.0021.200.0019.70
Louisiana13902.84902.84153.1819.559.700.00
Maine5366.54366.540.0050.470.000.00
Maryland16481.04481.0437.5990.160.000.00
Massachusetts13565.63565.6312.9099.230.000.00
Michigan131,245.971,240.770.0066.800.005.20
Minnesota9952.88912.730.000.000.0040.15
Mississippi6710.04684.840.000.000.0025.20
Missouri171,187.561,180.060.0021.020.007.50
Montana51,198.881,191.230.000.000.007.65
Nebraska6481.66481.660.000.000.000.00
Nevada4559.97559.970.0016.110.000.00
North Hampshire5224.54224.540.005.680.000.00
New Jersey10431.36431.3627.300.000.000.00
New Mexico3999.90999.900.000.000.000.00
New York291,693.931,974.7365.81104.48176.5719.20
North Carolina121,053.291,014.780.00143.9424.3738.51
North Dakota3571.13571.130.000.000.000.00
Ohio211,726.401,572.350.0035.000.00154.05
Oklahoma7935.36929.460.00120.650.005.90
Oregon6727.41727.410.006.890.000.00
Pennsylvania221,850.111,759.340.00138.8559.9990.77
Puerto Rico3249.77249.770.00249.770.000.00
Rhode Island368.5368.530.000.000.000.00
South Carolina10846.58846.580.0071.200.000.00
South Dakota4678.31678.310.000.000.000.00
Tennessee141,096.791,073.990.0035.020.0022.80
Texas173,332.793,233.450.0069.530.0099.34
Utah5977.29938.000.000.000.0039.29
Vermont4320.22320.220.000.000.000.00
Virginia161,156.431,117.230.0045.280.0039.20
Washington7763.67763.670.000.000.000.00
West Virginia7612.93549.050.0032.060.0063.88
Wisconsin7833.56741.800.00167.000.0091.76
Wyoming4913.60913.600.000.000.000.00
Totals:49947,908.0746,726.36402.833,546.22337.331,181.71

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This page last modified on 03/22/07
 

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