||This article's factual accuracy may be compromised due to out-of-date information. (February 2012)
In the United States, each state maintains its own system of state highways. This is a list of the longest state highways in each state. As of 2007 , the longest state highway in the nation is Montana Highway 200, which is 706.624 miles (1,137.201 km) long.
- ^ DC-295 is the only non-national route in the district.
- ^ NJ 47 is New Jersey's longest signed state highway, but NJ 444 (the unsigned designation for the Garden State Parkway) is longer at 172.4 miles (277.5 km)
- ^ OK-3's length was computed using OK-3E, the older (and longer) of its two forks.
- ^ Alabama Department of Transportation, County Milepost Maps, accessed September 2007
- ^ Alaska Department of Transportation and Public Facilities, Central Region General Log, April 25, 2006 (Routes 110000 (Sterling Highway), 130000 (Seward Highway), 134150 (Ingra Street), 134600 (6th Avenue), 134440 (5th Avenue), and 135000 (Glenn Highway))
Alaska Department of Transportation and Public Facilities, Northern Region General Log, April 25, 2006 (Routes 135000 (Glenn Highway), 190000 (Richardson Highway), and 230000 (Tok Cut-Off Highway))
- ^ "2006 State Highway System Log" (PDF). ADOT. Archived from the original (PDF) on 2008-06-25. Retrieved 2008-09-06.
- ^ Planning and Research Division (2010). "Arkansas Road Log Database" (Database). Arkansas State Highway and Transportation Department. Retrieved June 9, 2011.
- ^ "Truck Network Map". Dot.ca.gov. Retrieved 2014-03-01.
- ^ "Segment list for SH 14". Retrieved 2007-05-12.
- ^ "Connecticut State Numbered Routes and Roads" (PDF). Retrieved 2007-10-30.
- ^ http://www.deldot.gov/information/pubs_forms/manuals/traffic_counts/2006/pdf/rpt_pgs1_38_rev.pdf DelDOT 2006 Traffic Count and Mileage Report
- ^ "National Highway Planning Network GIS data". FHWA. August 2005. Archived from the original on 2007-08-23. Retrieved 2007-07-09.
- ^ FDOT straight line diagrams, accessed March 2014
- ^ Georgia DOT - 400 reports
- ^ Oscar Voss. "Hawaii Highways - Big Island route list". Retrieved 2007-10-22.
- ^ Idaho Transportation Department, Idaho milepoint log
- ^ Rand McNally. "The Road Atlas '04: United States, Canada and Mexico". Skokie: Rand McNally and Company. 2004.
- ^ Length of Indiana Route 37: Southern Segment (Map). Cartography by Tele Atlas. Google Inc. Retrieved 2009-08-12.
- ^ Length of Indiana Route 37: Northern Segment (Map). Cartography by Tele Atlas. Google Inc. Retrieved 2009-08-12.
- ^ "Table of active state highways". Iowahighways.org. Retrieved 2014-03-01.
- ^ "Kentucky Transportation Cabinet - Division of Planning - Highway Information System Official Milepoint Route Log Extract". Retrieved 2007-04-07.
- ^ "Louisiana State Highway Log". Southeastroads.com. Retrieved 2014-03-01.
- ^ "Floodgap Roadgap's RoadsAroundME: Maine State Route 11". Retrieved 2009-07-21.
- ^ Maryland State Highway Administration, Highway Location Reference, 2005
- ^ Executive Office of Transportation, Massachusetts Office of Transportation Planning - 2005 Road Inventory
- ^ "MDOT Physical Reference Finder Application". Michigan Department of Transportation. 2009. Retrieved April 13, 2010.
- ^ Minnesota Department of Transportation, Trunk Highway Log Point files, updated July 2006
- ^ Mississippi Route index: MS 15
- ^ Official 2007-2008 Montana Highway Travel Map (PDF) (Map). Montana Department of Transportation. Retrieved 2007-09-09.
- ^ Nebraska Department of Roads. "Nebraska Highway Reference Log Book" (PDF). Retrieved 2009-02-25.
- ^ "Nevada State Maintained Highways, Descriptions, Index and Maps". Nevadadot.com. Retrieved 2014-03-01.
- ^ New Hampshire DOT Route Logs (Free registration required)
- ^ New Jersey Department of Transportation. "Route 47 straight line diagram" (PDF). Retrieved 2007-04-09.
- ^ New Mexico Department of Transportation. "New Mexico Department of Transportation State Route Log" (PDF). Retrieved 2008-10-25.
- ^ "2007 Traffic Data Report for New York State" (PDF). New York State Department of Transportation. July 25, 2008. Retrieved July 17, 2009.
- ^ NCRoads.com: N.C. 24
- ^ Mileage retrieved from North Dakota Highways 101+ unless otherwise noted.
- ^ "RI82B: Centerline Miles, Lane Miles, and VMT by Route and County". Transportation System Development, Ohio Department of Transportation, 2008-05-13. Retrieved 2009-08-04.
- ^ Google (2014-04-27). "SH-3—Colorado to Seiling" (Map). Google Maps. Google. Retrieved 2014-04-27.
Google (2014-04-27). "SH-3—Seiling to Southwest Oklahoma City" (Map). Google Maps. Google. Retrieved 2014-04-27.
Google (2014-04-27). "SH-3—Overlap with I-240" (Map). Google Maps. Google. Retrieved 2014-04-27.
Google (2014-05-13). "SH-3—Overlap with I-40" (Map). Google Maps. Google. Retrieved 2014-05-13.
Google (2014-05-13). "SH-3E" (Map). Google Maps. Google. Retrieved 2014-05-13.
Google (2014-05-23). "SH-3—Ada to Idabel" (Map). Google Maps. Google. Retrieved 2014-05-23.
Google (2014-05-23). "SH-3—Idabel to Arkansas" (Map). Google Maps. Google. Retrieved 2014-05-23.
- ^ Oregon Department of Transportation, Public Road Inventory (primarily the Digital Video Log), accessed March 2008
- ^ Calculated using DeLorme Street Atlas USA software
- ^ Google (2011-12-20). "Overview map of RI 114" (Map). Google Maps. Google. Retrieved 2011-12-20.
- ^ Length of South Carolina Highway 9 (Map). Cartography by Tele Atlas. Google Inc. Retrieved 2009-08-11.
- ^ Length of South Dakota Route 20: Western Segment (Map). Cartography by Tele Atlas. Google Inc. Retrieved 2009-08-11.
- ^ Length of South Dakota Route 20: Eastern Segment (Map). Cartography by Tele Atlas. Google Inc. Retrieved 2009-08-11.
- ^ Texas Department of Transportation, State Highway, Loop and Spur Facts, accessed 2009-07-20
- ^ "HIghway Reference". Utah Department of Transportation. Retrieved January 27, 2014.
- ^ "2004 (Route Log) AADTs - State Highways" (PDF). Vermont Agency of Transportation. Archived from the original (PDF) on 2007-10-27. Retrieved 2007-10-28.
- ^ Virginia Department of Transportation, DRAFT Roadway Network (GIS data), October 2006
- ^ Staff (2013). "State Highway Log: Planning Report 2013, SR 2 to SR 971" (PDF). Washington State Department of Transportation. pp. 524–585.
- ^ Distance calculated using Microsoft MapPoint mapping software.
- ^ Wisconsin Department of Transportation, Wisconsin Highway Trivia, accessed October 2007
- ^ "Length of Wyoming 789". Maps.google.com. 1970-01-01. Retrieved 2014-03-01.