List of Interstate Highways in Wyoming

Last updated

I-80 (WY).svg
I-180 (WY).svg
Business Loop 80.svg
Signage for Interstate 80, Interstate 180, and Interstate 80 Business
List of Interstate Highways in Wyoming
Interstate Highways highlighted in red
Highway names
Interstates Interstate X (I-X)
Business routes:Interstate X Business (I-X Bus.)
System links
  • Wyoming State Highway System

The Interstate Highways in Wyoming are the segments of the Dwight D. Eisenhower National System of Interstate and Defense Highways owed and maintained by the Wyoming Department of Transportation. It comprises 914 miles (1,471 km) on four routes as well as Business Interstate Highways. Construction began in September 1956 on Interstate 25 (I-25) and the network was completed in October 1985. [1] It cost an estimated $570 million to build Wyoming's portion of the Interstate Highway System. [2]

Contents

Mainline highways

NumberLength (mi)Length (km)Southern or western terminusNorthern or eastern terminusFormedRemovedNotes
I-25.svg I-25 300.53483.66 I-25 / US 87 at the Colorado state line towards Denver I-90 / US 87 at Buffalo, Wyoming with passageways to Billings, Montana and Rapid City, South Dakota 01956-01-011956currentRuns concurrently with US 87 almost entirely in the state
I-80.svg I-80 402.78648.21 I-80 / US 189 at the Utah state line towards Salt Lake City I-80 at the Nebraska state line towards Ogallala 01956-01-011956currentLongest interstate in Wyoming; also known as the Lincoln Highway
I-90.svg I-90 208.80336.03 I-90 / US 87 at the Montana state line towards Billings I-90 / US 14 at the South Dakota state line towards Rapid City 01956-01-011956currentOnly Interstate that does not serve Cheyenne
I-180.svg I-180 1.091.75 I-80 in Cheyenne I-80 Bus. / US 30 in Cheyenne 01984-01-011984currentHighway not up to Interstate Highway standards; runs concurrently with I-25 Business, US 85, and US 87 Business in its entire length; also the only auxiliary route in Wyoming

Business routes

NumberLength (mi)Length (km)Southern or western terminusNorthern or eastern terminusFormedRemovedNotes
Business Loop 25.svg I-25 BL 8.00612.884 I-25/US 87 in Cheyenne I-25/US 87 in Cheyenne——Runs entirely concurrently with US 87 Business; also runs concurrently with I-180 and US 85 entering Cheyenne
Business Loop 25.svg I-25 BL 3.285.28I-25/US 87 and WYO 211 in Chugwater I-25/US 87 and WYO 321 northeast of Chugwater——Entirely concurrent with WYO 313 and WYO 321
Business Loop 25.svg I-25 BL 4.9667.992I-25/US 87 in Douglas I-25/US 87 southeast of Douglas——Entirely concurrent with US 20 Business, US 26 Business, and US 87 Business
Business Loop 25.svg I-25 BL 6.9811.23I-25/US 87 southwest of Glenrock I-25/US 20/US 26/US 87 southeast of Glenrock——Runs concurrently with County Road 19 entering Glenrock and then US 20 and US 26 heading east of Glenrock
Business Loop 25.svg I-25 BL 2.1803.508I-25/US 87 in Casper I-25/US 20/US 26/US 87 east of Casper——Unsigned; entirely concurrent with US 87 Business; also runs concurrently with unsigned WYO 255, US 20, and US 26
Business Loop 25.svg I-25 BL 1.6732.692I-25/US 87 south of Buffalo I-90/US 87 north of Buffalo——Entirely concurrent with US 87 Business; also runs concurrently with I-90 Business and WYO 196
Business Loop 80.svg I-80 BL 3.1505.069 I-80/US 189 west of Evanston I-80/US 189 east of Evanston——Entirely concurrent with US 189 Business; also runs concurrently with WYO 89
Business Loop 80.svg I-80 BL 15.63025.154I-80 west of Fort Bridger I-80 east of Lyman ——Longest Interstate business route in Wyoming; also the only business route in Wyoming not concurrent with another route
Business Loop 80.svg I-80 BL 2.54.0I-80/US 30 northwest of Green River I-80/US 30 east of Green River——Entirely concurrent with US 30 Business; also runs concurrently with WYO 374
Business Loop 80.svg I-80 BL 4.1206.630I-80/US 30/US 191 west of Rock Springs I-80/US 30 northeast of Rock Springs——Entirely concurrent with US 30 Business
Business Loop 80.svg I-80 BL 3.7706.067I-80/US 30 west of Rawlins I-80/US 30/US 287 ——Entirely concurrent with US 30 Business; also runs concurrently with US 287
Business Loop 80.svg I-80 BL 6.35710.231I-80 in Laramie I-80/US 30 east of Laramie——Runs concurrently with US 30, US 287, and County Road 322 north of Laramie
Business Loop 80.svg I-80 BL 6.93511.161I-80 west of CheyenneI-80/US 30 east of Cheyenne——Entirely concurrent with US 30
Business Loop 90.svg I-90 BL 5.48.7I-90/US 14/US 87 north of Sheridan I-90 southeast of Sheridan——Entirely concurrent with US 14; also runs concurrently with US 87
Business Loop 90.svg I-90 BL 2.23.5I-90/US 87 north of BuffaloI-90 east of Buffalo——Runs concurrently with I-25 Business, WYO 196, US 87 Business, and then US 16
Business Loop 90.svg I-90 BL 3.35.3I-90 west of Gillette I-90/US 14/US 16 east of Gillette——Runs concurrently with US 14 and US 16 almost in its entire length; also runs concurrently with WYO 50 and WYO 59
Business Loop 90.svg I-90 BL 1.62.6I-90 northwest of Moorcroft I-90 in Moorcroft——Unsigned; runs concurrently with US 14 and US 16 entering Moorcroft
Business Loop 90.svg I-90 BL 3.45.5I-90 southwest of Sundance I-90 east of Sundance——Entirely concurrent with US 14

See also

References

  1. ↑ Waggener, John (June 21, 2021). "65 Years Ago: Ellis Armstrong and America's Interstate Highway System". American Heritage Center . Retrieved November 13, 2022.
  2. ↑ "Wyoming, Montana officials dedicate 10-mile section of I-90 near Sheridan". Casper Star-Tribune . Associated Press. October 10, 1985. p. B1. Retrieved November 13, 2022– via Newspapers.com.
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