U.S. Route 131 (English Wikipedia)

Unlike the rest of US 131, the section that is officially I-296 was funded by the federal government as a part of the Interstate Highway System because it was constructed and included in the system before 1978. The Surface Transportation Assistance Act of 1978 provided that all Interstate construction authorized under previous amendments to the system would be funded by the federal government but additional highway mileage added under 23 U.S.C. § 103(c)(4)(A) would not be funded from the same highway fund.^[59]^[60]

dot.gov

fhwa.dot.gov

Federal Highway Administration (March 5, 2010). National Highway System: Indiana (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Archived from the original (PDF) on June 7, 2011. Retrieved December 12, 2010.
Natzke, Stefan; Neathery, Mike & Adderly, Kevin (August 26, 2010). "What is the National Highway System?". National Highway System. Federal Highway Administration. Archived from the original on July 4, 2012. Retrieved December 12, 2010.
Federal Highway Administration (October 31, 2002). "Table 2: Auxiliary Routes of the Eisenhower National System Of Interstate and Defense Highways". Route Log and Finder List. Federal Highway Administration. OCLC 47914009. Archived from the original on September 21, 2009. Retrieved December 22, 2009.
Federal Highway Administration (March 22, 2007). "FHWA Route Log and Finder List: Expansion of Mileage". Federal Highway Administration. OCLC 47914009. Archived from the original on July 21, 2013. Retrieved January 4, 2010.

fox17online.com

Westaby, Robb (October 30, 2013). "New US 131 Bypass Opens". Grand Rapids, Michigan: WXMI-TV. Archived from the original on November 3, 2013. Retrieved October 30, 2013.

govdelivery.com

content.govdelivery.com

Schirripa, Nick (August 31, 2015). "Stadium Drive Reconstruction Complete at US 131 in Kalamazoo, Opens to Traffic on Thursday" (Press release). Michigan Department of Transportation. Archived from the original on May 20, 2016. Retrieved November 19, 2018.

in.gov

Indiana Department of Transportation (July 2015). Reference Post Book (PDF). Indianapolis: Indiana Department of Transportation. US 131. Retrieved November 3, 2016.
Indiana Department of Transportation. "Facts & Photos". Indiana Department of Transportation. Archived from the original on July 18, 2011. Retrieved July 30, 2011.

dotmaps.indot.in.gov

Indiana Department of Transportation (2007). "Indiana Average Daily Traffic and Commercial Vehicles". Indiana Department of Transportation. Archived from the original on December 15, 2010. Retrieved February 1, 2011.

kalkaskalibrary.org

history.kalkaskalibrary.org

"Plan US 131 Work for Antrim County" (PDF). The Leader and the Kalkaskian. Kalkaksa, Michigan. May 9, 1968. p. 6. Retrieved January 5, 2015 – via Kalkaska Public Library.

maps.google.com

Google (January 18, 2011). "US 131 in Michigan" (Map). Google Maps. Google. Retrieved January 18, 2011.
Google (April 7, 2011). "Approximate Route of US 131 in 1926" (Map). Google Maps. Google. Retrieved April 7, 2011.

measuringworth.com

Johnston, Louis & Williamson, Samuel H. (2023). "What Was the U.S. GDP Then?". MeasuringWorth. Retrieved November 30, 2023. United States Gross Domestic Product deflator figures follow the MeasuringWorth series.

michigan.gov

Michigan Department of Transportation (April 23, 2006). National Highway System, Michigan (PDF) (Map). Scale not given. Lansing: Michigan Department of Transportation. Archived from the original (PDF) on October 4, 2012. Retrieved October 7, 2008.
Michigan Department of Transportation & Michigan Center for Shared Solutions & Technology Partnerships (April 2009). Michigan's Railroad System (PDF) (Map). Scale not given. Lansing: Michigan Department of Transportation. Archived from the original (PDF) on September 4, 2012. Retrieved September 14, 2010.
Michigan Department of Transportation (2019). Truck Operator's Map (PDF) (Map). c. 1:221,760. Lansing: Michigan Department of Transportation. Kalamazoo inset.
Schirripa, Nick (January 22, 2013). "US 131 Constantine Bypass Construction To Start in February" (Press release). Michigan Department of Transportation. Archived from the original on January 27, 2013. Retrieved January 26, 2013.
Michigan Department of Transportation (June 2, 2008). "Division Avenue–Plaster Creek". Historic Bridge Listing. Michigan Department of Transportation. Archived from the original on December 30, 2010. Retrieved January 29, 2011.
Michigan Department of Transportation (May 13, 2002). "190th. Avenue–Little Muskegon River". Historic Bridge Listing. Michigan Department of Transportation. Archived from the original on December 30, 2010. Retrieved January 29, 2011.

michiganology.org

Michigan State Highway Department (July 1, 1919). State of Michigan (Map). Scale not given. Lansing: Michigan State Highway Department. Lower Peninsula sheet. OCLC 15607244. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department & Rand McNally (December 15, 1936). Official Michigan Highway Map (Map) (Winter ed.). [c. 1:850,000]. Lansing: Michigan State Highway Department. § N9. OCLC 12701143, 317396365. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (October 1, 1953). Official Highway Map (Map). Scale not given. Lansing: Michigan State Highway Department. Grand Rapids inset. OCLC 12701120. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (April 15, 1954). Michigan Water Wonderland: Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. § N9. OCLC 12701120. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (1958). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. § L9. OCLC 12701120, 51856742. Retrieved October 17, 2019 – via Michigan History Center. (Includes all changes through July 1, 1958)
Michigan State Highway Department (1960). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. §§ L9–M9, N8–N9. OCLC 12701120, 81552576. Retrieved October 17, 2019 – via Michigan History Center. (Includes all changes through July 1, 1960)
Michigan State Highway Department (1962). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. §§ K9–M9. OCLC 12701120, 173191490. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (1963). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. § M9. OCLC 12701120. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (1964). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. § M9. OCLC 12701120, 81213707. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (1965). Official Highway Map (Map). Scale not given. Lansing: Michigan State Highway Department. Kalamazoo inset. OCLC 12701120. Retrieved October 17, 2019 – via Michigan History Center.
Michigan Department of State Highways and Transportation (1974). Michigan, Great Lake State: Official Transportation Map (Map). c. 1:918,720. Lansing: Michigan Department of State Highways and Transportation. § J8–K9. OCLC 12701177, 83138602. Retrieved October 17, 2019 – via Michigan History Center.
Michigan Department of State Highways and Transportation (1979). Michigan, Great Lake State: Official Transportation Map (Map) (1978–1979 ed.). c. 1:190,080. Lansing: Michigan Department of State Highways and Transportation. Grand Rapids inset. OCLC 12701177. Retrieved October 17, 2019 – via Michigan History Center.
Michigan Department of Transportation (1985). Yes Michigan: Official Transportation Map (Map). c. 1:918,720. Lansing: Michigan Department of Transportation. §§ I9–J9. OCLC 12701177. Retrieved October 17, 2019 – via Michigan History Center.

mlive.com

Kaminski, Steve (May 1, 2008). "Vintage Racing Season Starting up at Springport". The Grand Rapids Press. OCLC 9975013. Archived from the original on October 14, 2012. Retrieved August 4, 2011.
Rietsma, Jeff. "Plans for US 131 Bypass and Bridge in Constantine Advance Despite Uncertainties over State Funding". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved January 28, 2011.
Barrett, Malachi (January 8, 2019). "Kalamazoo Accepts Control of State Trunklines Spanning City". MLive. Booth Newspapers. Retrieved April 23, 2019.
Harger, Jim (August 28, 2009). "Expect Bridge Repair to Cause Long Detours on US 131 North of Cadillac for Nine Months". The Grand Rapids Press. OCLC 9975013. Archived from the original on August 18, 2010. Retrieved February 5, 2011.
Jessup, Kathy (April 20, 2006). "Deal Will Open Door to US 131 Expansion, Funding". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved February 5, 2011.
Riestma, Jeff (May 21, 2008). "Michigan Department of Transportation Updates US 131 Plans". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved February 5, 2011.
Killian, Chris & Parker, Rosemary (March 14, 2010). "Gazette Report Shows Where Most Auto Crashes Occur in Southwest Michigan". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved February 5, 2011.
Shular, Daniel (February 23, 2022). "Grand Rapids Advocates Use 'Tenacity' to Get Streets Named for Civil Rights Leaders, Icon's Nephew Says". MLive. Retrieved May 29, 2022.

news.google.com

"Electronic Wonder: State Seeks Highway". The Michigan Daily. University of Michigan, Ann Arbor. July 13, 1961. p. 3. ISSN 0745-967X. OCLC 923790299. Retrieved August 25, 2013.
"Freeway Dedicated". The Argus-Press. Owosso, Michigan. Associated Press. September 21, 1973. p. 2. OCLC 9802802. Retrieved February 26, 2011.
"Highway Additions Requested By State". The Argus Press. Owosso, Michigan. Associated Press. November 14, 1968. p. 7. OCLC 9802802. Archived from the original on September 4, 2015. Retrieved December 5, 2010.
Johnson, Malcolm (January 8, 1986). "Ludington Freeway 'Assured'". Ludington Daily News. p. 4. OCLC 27033604. Retrieved December 5, 2010 – via Google News.
Hoffman, Kathy Barks (January 26, 2000). "MDOT Announces Five-Year Road Repair Plan". Ludington Daily News. Associated Press. p. A1. OCLC 27033604. Retrieved February 5, 2011 – via Google News.

newspapers.com

Schneider, John (January 26, 2011). "MDOT Removes Sex Offender's Name from Rest Area". Lansing State Journal. ISSN 0274-9742. OCLC 6678181. Retrieved July 13, 2018 – via Newspapers.com.
"US 131 Association Pushes for Faster Freeway Schedule". Ludington Daily News. United Press International. September 21, 1972. p. 1. OCLC 27033604. Retrieved July 13, 2018 – via Newspapers.com.
"News Capsules: Freeway". Ludington Daily News. November 2, 1976. p. 1. OCLC 27033604. Retrieved July 13, 2018 – via Newspapers.com.
Johnson, Malcolm (December 23, 1977). "Why Michigan Is Curbing Freeways". Ludington Daily News. Associated Press. p. 2. OCLC 27033604. Retrieved July 13, 2018 – via Newspapers.com.
Meyer, Zlati (August 15, 2010). "You Haven't Lived Here Until... You Take a Summer Drive Along US 131". Detroit Free Press. p. 16A. ISSN 1055-2758. OCLC 10345127, 137343179. Retrieved July 13, 2018 – via Newspapers.com.

nps.gov

nrhp.focus.nps.gov

National Park Service (July 9, 2010). "National Register Information System". National Register of Historic Places. National Park Service. Retrieved January 28, 2011.

oclc.org

seekingmichigan.contentdm.oclc.org

Michigan State Highway Department & Rand McNally (July 1, 1931). Official Highway Service Map (Map). Scale not given. Lansing: Michigan State Highway Department. Grand Rapids inset. OCLC 12701053. Archived from the original on May 10, 2017. Retrieved December 18, 2016 – via Archives of Michigan.

pqarchiver.com

pqasb.pqarchiver.com

Mumford, Lou (April 21, 2006). "US 131 Project a 'Go': MDOT Reverses Stance, Leading to Agreement on Four-Lane Highway". South Bend Tribune. p. 1. OCLC 8793233. Archived from the original on April 19, 2013. Retrieved February 5, 2011 – via ProQuest Archiver.

record-eagle.com

McWhirter, Sheri (March 2, 2010). "Kalkaska Shoe Tree Trimmed, but still Alive". Traverse City Record-Eagle. OCLC 30098364. Archived from the original on July 22, 2011. Retrieved January 28, 2011.

state.mi.us

mdotgis.state.mi.us

Michigan Department of Transportation (2021). Next Generation PR Finder (Map). Michigan Department of Transportation. Retrieved October 11, 2021.

mdotnetpublic.state.mi.us

Bureau of Transportation Planning (2008). "Traffic Monitoring Information System". Michigan Department of Transportation. Retrieved February 1, 2011.

transportation.org

environment.transportation.org

Center for Environmental Excellence (September 6–8, 2006). "US 131 S-Curve" (PDF). American Association of State Highway and Transportation Officials. Archived from the original (PDF) on July 21, 2011. Retrieved December 5, 2010.

sp.route.transportation.org

Special Committee on U.S. Route Numbering (November 16, 2012). "SCOH Report from Special Committee on U.S. Route Numbering Annual Meeting" (PDF) (Report). Washington, DC: American Association of State Highway and Transportation Officials. p. 3. Archived from the original (PDF) on June 3, 2019. Retrieved November 29, 2012.

uslaw.link

Surface Transportation Assistance Act of 1978. Pub. L.Tooltip Public Law (United States) 99–599

web.archive.org

Federal Highway Administration (March 5, 2010). National Highway System: Indiana (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Archived from the original (PDF) on June 7, 2011. Retrieved December 12, 2010.
Michigan Department of Transportation (April 23, 2006). National Highway System, Michigan (PDF) (Map). Scale not given. Lansing: Michigan Department of Transportation. Archived from the original (PDF) on October 4, 2012. Retrieved October 7, 2008.
Natzke, Stefan; Neathery, Mike & Adderly, Kevin (August 26, 2010). "What is the National Highway System?". National Highway System. Federal Highway Administration. Archived from the original on July 4, 2012. Retrieved December 12, 2010.
Indiana Department of Transportation (2007). "Indiana Average Daily Traffic and Commercial Vehicles". Indiana Department of Transportation. Archived from the original on December 15, 2010. Retrieved February 1, 2011.
Michigan Department of Transportation & Michigan Center for Shared Solutions & Technology Partnerships (April 2009). Michigan's Railroad System (PDF) (Map). Scale not given. Lansing: Michigan Department of Transportation. Archived from the original (PDF) on September 4, 2012. Retrieved September 14, 2010.
Federal Highway Administration (October 31, 2002). "Table 2: Auxiliary Routes of the Eisenhower National System Of Interstate and Defense Highways". Route Log and Finder List. Federal Highway Administration. OCLC 47914009. Archived from the original on September 21, 2009. Retrieved December 22, 2009.
McWhirter, Sheri (March 2, 2010). "Kalkaska Shoe Tree Trimmed, but still Alive". Traverse City Record-Eagle. OCLC 30098364. Archived from the original on July 22, 2011. Retrieved January 28, 2011.
Michigan State Highway Department & Rand McNally (July 1, 1931). Official Highway Service Map (Map). Scale not given. Lansing: Michigan State Highway Department. Grand Rapids inset. OCLC 12701053. Archived from the original on May 10, 2017. Retrieved December 18, 2016 – via Archives of Michigan.
Schirripa, Nick (August 31, 2015). "Stadium Drive Reconstruction Complete at US 131 in Kalamazoo, Opens to Traffic on Thursday" (Press release). Michigan Department of Transportation. Archived from the original on May 20, 2016. Retrieved November 19, 2018.
Indiana Department of Transportation. "Facts & Photos". Indiana Department of Transportation. Archived from the original on July 18, 2011. Retrieved July 30, 2011.
Federal Highway Administration (March 22, 2007). "FHWA Route Log and Finder List: Expansion of Mileage". Federal Highway Administration. OCLC 47914009. Archived from the original on July 21, 2013. Retrieved January 4, 2010.
Kaminski, Steve (May 1, 2008). "Vintage Racing Season Starting up at Springport". The Grand Rapids Press. OCLC 9975013. Archived from the original on October 14, 2012. Retrieved August 4, 2011.
"Highway Additions Requested By State". The Argus Press. Owosso, Michigan. Associated Press. November 14, 1968. p. 7. OCLC 9802802. Archived from the original on September 4, 2015. Retrieved December 5, 2010.
Center for Environmental Excellence (September 6–8, 2006). "US 131 S-Curve" (PDF). American Association of State Highway and Transportation Officials. Archived from the original (PDF) on July 21, 2011. Retrieved December 5, 2010.
Schirripa, Nick (January 22, 2013). "US 131 Constantine Bypass Construction To Start in February" (Press release). Michigan Department of Transportation. Archived from the original on January 27, 2013. Retrieved January 26, 2013.
Staff writer (January 11, 2011). "New Bypass Considered around Constantine". Kalamazoo, Michigan: WWMT-TV. Archived from the original on July 28, 2011. Retrieved January 28, 2011.
Rietsma, Jeff. "Plans for US 131 Bypass and Bridge in Constantine Advance Despite Uncertainties over State Funding". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved January 28, 2011.
Westaby, Robb (October 30, 2013). "New US 131 Bypass Opens". Grand Rapids, Michigan: WXMI-TV. Archived from the original on November 3, 2013. Retrieved October 30, 2013.
Harger, Jim (August 28, 2009). "Expect Bridge Repair to Cause Long Detours on US 131 North of Cadillac for Nine Months". The Grand Rapids Press. OCLC 9975013. Archived from the original on August 18, 2010. Retrieved February 5, 2011.
Jessup, Kathy (April 20, 2006). "Deal Will Open Door to US 131 Expansion, Funding". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved February 5, 2011.
Riestma, Jeff (May 21, 2008). "Michigan Department of Transportation Updates US 131 Plans". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved February 5, 2011.
Killian, Chris & Parker, Rosemary (March 14, 2010). "Gazette Report Shows Where Most Auto Crashes Occur in Southwest Michigan". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved February 5, 2011.
Special Committee on U.S. Route Numbering (November 16, 2012). "SCOH Report from Special Committee on U.S. Route Numbering Annual Meeting" (PDF) (Report). Washington, DC: American Association of State Highway and Transportation Officials. p. 3. Archived from the original (PDF) on June 3, 2019. Retrieved November 29, 2012.
Staff writer (June 7, 2009). "Local US 131 Projects Are on Hold". Three Rivers, Michigan: WLKM-FM. Archived from the original on July 24, 2011. Retrieved January 28, 2011.
Michigan Department of Transportation (June 2, 2008). "Division Avenue–Plaster Creek". Historic Bridge Listing. Michigan Department of Transportation. Archived from the original on December 30, 2010. Retrieved January 29, 2011.
Michigan Department of Transportation (May 13, 2002). "190th. Avenue–Little Muskegon River". Historic Bridge Listing. Michigan Department of Transportation. Archived from the original on December 30, 2010. Retrieved January 29, 2011.

wikimedia.org

commons.wikimedia.org

Bureau of Public Roads & American Association of State Highway Officials (November 11, 1926). United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Washington, DC: United States Geological Survey. OCLC 32889555. Retrieved November 7, 2013 – via Wikimedia Commons.

wikisource.org

en.wikisource.org

Kulsea, Bill & Shawver, Tom (1980). Making Michigan Move: A History of Michigan Highways and the Michigan Department of Transportation. Lansing: Michigan Department of Transportation. p. 27. OCLC 8169232. Retrieved January 18, 2021 – via Wikisource.
Kulsea & Shawver (1980), pp. 30–31.
Kulsea & Shawver (1980), p. 16.

wlkm.com

Staff writer (June 7, 2009). "Local US 131 Projects Are on Hold". Three Rivers, Michigan: WLKM-FM. Archived from the original on July 24, 2011. Retrieved January 28, 2011.

worldcat.org

McNichol, Dan (2006). The Roads that Built America. New York: Sterling. p. 74. ISBN 1-4027-3468-9. OCLC 63377558.
Indiana Department of Transportation (January 2009). Indiana Transportation Map (Map) (2009–10 ed.). [c. 1:560,000]. Indianapolis: Indiana Department of Transportation. § A8. OCLC 654100248.
Hoogterp, Ed (January 18, 1981). "US 131 Won't Hit the Straits". The Grand Rapids Press. pp. 1F, 2F. OCLC 9975013.
Michigan Department of Transportation (2010). Uniquely Michigan: Official Department of Transportation Map (Map). c. 1:975,000. Lansing: Michigan Department of Transportation. §§ E8–N9. OCLC 42778335, 639960603.
Bauza, Margarita (December 19, 2000). "South Beltline Junction to be Area's Largest: The Cloverleaf Interchange with US 131 Will Stretch for a Mile and Require Widening of the Road". The Grand Rapids Press. p. A1. OCLC 9975013.
Federal Highway Administration (October 31, 2002). "Table 2: Auxiliary Routes of the Eisenhower National System Of Interstate and Defense Highways". Route Log and Finder List. Federal Highway Administration. OCLC 47914009. Archived from the original on September 21, 2009. Retrieved December 22, 2009.
Rand McNally (2008). "Michigan" (Map). The Road Atlas. 1:1,267,200. Chicago: Rand McNally. p. 51. §§ M6–N6. ISBN 0-528-93981-5. OCLC 226315010.
McWhirter, Sheri (March 2, 2010). "Kalkaska Shoe Tree Trimmed, but still Alive". Traverse City Record-Eagle. OCLC 30098364. Archived from the original on July 22, 2011. Retrieved January 28, 2011.
Schneider, John (January 26, 2011). "MDOT Removes Sex Offender's Name from Rest Area". Lansing State Journal. ISSN 0274-9742. OCLC 6678181. Retrieved July 13, 2018 – via Newspapers.com.
"State Plans New Rest Area Along US 131". The Grand Rapids Press. September 1, 2000. p. C3. OCLC 9975013.
"State Drops out of Deal to Build Dorr Rest Area". The Grand Rapids Press. October 11, 2001. p. 1. OCLC 9975013.
Greenwood, Tom (April 30, 2008). "MDOT Web Site Has Details for Gas Savers". The Detroit News. p. 2A. ISSN 1055-2715. OCLC 137348716.
Burns, Robert C. (May 1, 2008). "MDOT Touts Vanpooling: Commuters Can Share Gas Sosts via Michivan Service System". The Grand Rapids Press. p. B6. OCLC 9975013.
Morrison, Roger L. (Autumn 1937). "The History and Development of Michigan Highways". Michigan Alumnus Quarterly Review. Vol. 39, no. 54. Ann Arbor: University of Michigan Bureau of Alumni Relations. pp. 59–73. OCLC 698029175.
Mason, Philip P. (1959). Michigan Highways From Indian Trails to Expressways. Ann Arbor, Michigan: Braun-Brumfield. p. 18. OCLC 23314983.
Mason, Phillip P. (1980). Howard, Saralee R. & Walters, Timothy N (eds.). "The Plank Road Craze: A Chapter in the History of Michigan's Highways". Great Lakes Informant. Vol. 2, no. 1. Lansing: Michigan Department of State. pp. 1–4. OCLC 17646708.
Michigan State Highway Department (July 1, 1919). State of Michigan (Map). Scale not given. Lansing: Michigan State Highway Department. Lower Peninsula sheet. OCLC 15607244. Retrieved October 17, 2019 – via Michigan History Center.
"Michigan May Do Well Following Wisconsin's Road Marking System". The Grand Rapids Press. September 20, 1919. p. 10. OCLC 9975013.
Bureau of Public Roads & American Association of State Highway Officials (November 11, 1926). United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Washington, DC: United States Geological Survey. OCLC 32889555. Retrieved November 7, 2013 – via Wikimedia Commons.
Kulsea, Bill & Shawver, Tom (1980). Making Michigan Move: A History of Michigan Highways and the Michigan Department of Transportation. Lansing: Michigan Department of Transportation. p. 27. OCLC 8169232. Retrieved January 18, 2021 – via Wikisource.
Michigan State Highway Department & Rand McNally (July 1, 1931). Official Highway Service Map (Map). Scale not given. Lansing: Michigan State Highway Department. Grand Rapids inset. OCLC 12701053. Archived from the original on May 10, 2017. Retrieved December 18, 2016 – via Archives of Michigan.
Michigan State Highway Department & Rand McNally (June 1, 1936). Official Michigan Highway Map (Map). [c. 1:850,000]. Lansing: Michigan State Highway Department. § N9. OCLC 12701143.
Michigan State Highway Department & Rand McNally (December 15, 1936). Official Michigan Highway Map (Map) (Winter ed.). [c. 1:850,000]. Lansing: Michigan State Highway Department. § N9. OCLC 12701143, 317396365. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department & Rand McNally (April 15, 1939). Official Michigan Highway Map (Map) (Summer ed.). [c. 1:850,000]. Lansing: Michigan State Highway Department. §§ E9–G10. OCLC 12701143.
Michigan State Highway Department & Rand McNally (December 1, 1940). Official Michigan Highway Map (Map) (Winter ed.). [c. 1:850,000]. Lansing: Michigan State Highway Department. § G9. OCLC 12701143.
Michigan State Highway Department & Rand McNally (December 1, 1941). Official Michigan Highway Map (Map) (Winter ed.). [c. 1:850,000]. Lansing: Michigan State Highway Department. § G9. OCLC 12701143.
Michigan State Highway Department (October 1, 1945). Official Highway Map of Michigan (Map). Scale not given. Lansing: Michigan State Highway Department. Grand Rapids inset. OCLC 554645076.
Michigan State Highway Department (April 15, 1953). Official Highway Map (Map). Scale not given. Lansing: Michigan State Highway Department. Grand Rapids inset. OCLC 12701120.
Michigan State Highway Department (October 1, 1953). Official Highway Map (Map). Scale not given. Lansing: Michigan State Highway Department. Grand Rapids inset. OCLC 12701120. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (April 15, 1954). Michigan Water Wonderland: Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. § N9. OCLC 12701120. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (October 1, 1957). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. §§ L9, N9. OCLC 12701120, 367386492.
Michigan State Highway Department (1958). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. § L9. OCLC 12701120, 51856742. Retrieved October 17, 2019 – via Michigan History Center. (Includes all changes through July 1, 1958)
Michigan State Highway Department (1960). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. §§ L9–M9, N8–N9. OCLC 12701120, 81552576. Retrieved October 17, 2019 – via Michigan History Center. (Includes all changes through July 1, 1960)
"Electronic Wonder: State Seeks Highway". The Michigan Daily. University of Michigan, Ann Arbor. July 13, 1961. p. 3. ISSN 0745-967X. OCLC 923790299. Retrieved August 25, 2013.
"Driverless Auto Being Developed: Could Be Ready in 15 Years, Ohio Researcher Says". The New York Times. December 11, 1966. p. 132. ISSN 0362-4331. OCLC 1645522.
Michigan State Highway Department (1962). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. §§ K9–M9. OCLC 12701120, 173191490. Retrieved October 17, 2019 – via Michigan History Center.
Bauza, Margarita (August 11, 2000). "Road Open Ahead—First Travelers Will Walk New Northbound S-Curve on Saturday". The Grand Rapids Press. p. A1. OCLC 9975013.
"Asks Indiana To Extend US 131: Michigan Wants Continuation Southward to Link with US 31". The Grand Rapids Press. March 12, 1961. p. 10. OCLC 9975013.
"Driver's Boon: Int. 296 Opening Finishes City Freeway, Links Kalamazoo, Muskegon". The Grand Rapids Press. December 17, 1962. p. A1. OCLC 9975013.
Federal Highway Administration (March 22, 2007). "FHWA Route Log and Finder List: Expansion of Mileage". Federal Highway Administration. OCLC 47914009. Archived from the original on July 21, 2013. Retrieved January 4, 2010.
"Would Shift Route Number: Mackie Seeks Int. 96 Designations for Grand Rapids–Muskegon Stretch". The Grand Rapids Press. May 1, 1963. p. 31. OCLC 9975013.
Michigan State Highway Department (1963). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. § M9. OCLC 12701120. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (1964). Official Highway Map (Map). [c. 1:918,720]. Lansing: Michigan State Highway Department. § M9. OCLC 12701120, 81213707. Retrieved October 17, 2019 – via Michigan History Center.
Michigan State Highway Department (1965). Official Highway Map (Map). Scale not given. Lansing: Michigan State Highway Department. Kalamazoo inset. OCLC 12701120. Retrieved October 17, 2019 – via Michigan History Center.
"US 131 Section Opened". The Grand Rapids Press. September 8, 1966. p. 55. OCLC 9975013.
Kaminski, Steve (May 1, 2008). "Vintage Racing Season Starting up at Springport". The Grand Rapids Press. OCLC 9975013. Archived from the original on October 14, 2012. Retrieved August 4, 2011.
Michigan Department of State Highways (1970). Michigan, Great Lake State: Official Highway Map (Map). c. 1:918,720. Lansing: Michigan Department of State Highways. § K9. OCLC 12701120.
"Freeway Dedicated". The Argus-Press. Owosso, Michigan. Associated Press. September 21, 1973. p. 2. OCLC 9802802. Retrieved February 26, 2011.
Michigan Department of State Highways and Transportation (1974). Michigan, Great Lake State: Official Transportation Map (Map). c. 1:918,720. Lansing: Michigan Department of State Highways and Transportation. § J8–K9. OCLC 12701177, 83138602. Retrieved October 17, 2019 – via Michigan History Center.
"Major Freeway Work May Be Postponed". The Argus-Press. Owosso, Michigan. Associated Press. September 29, 1967. p. 11. OCLC 9802802.
"Highway Additions Requested By State". The Argus Press. Owosso, Michigan. Associated Press. November 14, 1968. p. 7. OCLC 9802802. Archived from the original on September 4, 2015. Retrieved December 5, 2010.
"US 131 Association Pushes for Faster Freeway Schedule". Ludington Daily News. United Press International. September 21, 1972. p. 1. OCLC 27033604. Retrieved July 13, 2018 – via Newspapers.com.
"News Capsules: Freeway". Ludington Daily News. November 2, 1976. p. 1. OCLC 27033604. Retrieved July 13, 2018 – via Newspapers.com.
Johnson, Malcolm (December 23, 1977). "Why Michigan Is Curbing Freeways". Ludington Daily News. Associated Press. p. 2. OCLC 27033604. Retrieved July 13, 2018 – via Newspapers.com.
"Mackie Denounces Upstate Resorters for Opposing Expressway". The Grand Rapids Press. July 23, 1957. p. 30. OCLC 9975013.
Michigan Department of State Highways and Transportation (1979). Michigan, Great Lake State: Official Transportation Map (Map) (1978–1979 ed.). c. 1:190,080. Lansing: Michigan Department of State Highways and Transportation. Grand Rapids inset. OCLC 12701177. Retrieved October 17, 2019 – via Michigan History Center.
Michigan Department of Transportation (1980). Michigan, Great Lake State: Official Transportation Map (Map) (1980–1981 ed.). c. 1:190,080. Lansing: Michigan Department of Transportation. Grand Rapids inset. OCLC 12701177, 606211521.
"Summer Start Is Seen on US 131, 31 Freeway Links". The Grand Rapids Press. January 18, 1978. p. B1. OCLC 9975013.
Michigan Department of Transportation (1985). Yes Michigan: Official Transportation Map (Map). c. 1:918,720. Lansing: Michigan Department of Transportation. §§ I9–J9. OCLC 12701177. Retrieved October 17, 2019 – via Michigan History Center.
Weeks, George (December 23, 1999). "Engler Kicks Road Plan into High Gear". The Detroit News. p. 11A. ISSN 1055-2715. OCLC 137348716.
Hoogterp, Ed (January 18, 1981). "The End of the Road". The Grand Rapids Press. p. 1F. OCLC 9975013.
"S-Curve Express: Kiewit Western, MDOT Merit Credit for a Fast Finish". The Grand Rapids Press. November 1, 2000. p. A16. OCLC 9975013.
Bauza, Margarita (August 1, 2000). "Part of S-Curve Open in 2 Weeks—The Work Is About Three Weeks Ahead of Schedule". The Grand Rapids Press. p. A1. OCLC 9975013.
Bauza, Margarita & Kolker, Ken (November 21, 2000). "S-Curve De-Icing Not Yet Ready for Prime Time—MDOT Will Not Begin Using the System Until Workers Complete a Series of Tests to Make Sure There Are No Leaks". The Grand Rapids Press. p. A13. OCLC 9975013.
"S-Curve Deicing System Now Operational". The Grand Rapids Press. December 13, 2000. p. D5. OCLC 9975013.
Bauza, Margarita (August 28, 2000). "Pride, not just Cash, Spurs Effort on S-Curve". The Grand Rapids Press. p. A1. OCLC 9975013.
Bauza, Margarita (November 14, 2000). "Finishing Touches Under Way on S-Curve—The Weather Is a Major Factor Before Parking Lots and Ramps Are Restored". The Grand Rapids Press. p. A17. OCLC 9975013.
King, Kyla (December 3, 2000). "More S-Curve Ramps to Open". The Grand Rapids Press. p. A21. OCLC 9975013.
Johnson, Malcolm (January 8, 1986). "Ludington Freeway 'Assured'". Ludington Daily News. p. 4. OCLC 27033604. Retrieved December 5, 2010 – via Google News.
Heinlein, Gary (February 4, 1999). "State to Spend $6.5B on Roads: Metro Detroit to Get Lion's Share Under Engler's 5-Year Plan". The Detroit News. p. 1A. ISSN 1055-2715. OCLC 137348716.
Bauza, Margarita (November 15, 2000). "Cadillac Hears Sounds of Silence Thanks to Bypass". The Grand Rapids Press. p. D1. OCLC 9975013.
Bornheimer, Hank (October 27, 2001). "Temporary Recreation Trail Ready for Traffic—You Can Walk, Run, Skate or Bike the Cadillac Bypass—until Tuesday". The Grand Rapids Press. p. A1. OCLC 9975013.
Barnett, LeRoy (2004). A Drive Down Memory Lane: The Named State and Federal Highways of Michigan. Allegan Forest, Michigan: Priscilla Press. p. 200. ISBN 1-886167-24-9. OCLC 57425393.
Michigan Department of Transportation (2004). Michigan: Official Department of Transportation Map (Map) (2003–2004 ed.). c. 1:975,000. Lansing: Michigan Department of Transportation. § H9. OCLC 42778335, 53197160.
Rietsma, Jeff. "Plans for US 131 Bypass and Bridge in Constantine Advance Despite Uncertainties over State Funding". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved January 28, 2011.
Hoffman, Kathy Barks (January 26, 2000). "MDOT Announces Five-Year Road Repair Plan". Ludington Daily News. Associated Press. p. A1. OCLC 27033604. Retrieved February 5, 2011 – via Google News.
Harger, Jim (August 28, 2009). "Expect Bridge Repair to Cause Long Detours on US 131 North of Cadillac for Nine Months". The Grand Rapids Press. OCLC 9975013. Archived from the original on August 18, 2010. Retrieved February 5, 2011.
Jessup, Kathy (April 20, 2006). "Deal Will Open Door to US 131 Expansion, Funding". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved February 5, 2011.
Heinlein, Gary (November 18, 2005). "State Road Repairs Put on Fast Track". The Detroit News. p. A1. ISSN 1055-2715. OCLC 137348716.
Riestma, Jeff (May 21, 2008). "Michigan Department of Transportation Updates US 131 Plans". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved February 5, 2011.
Killian, Chris & Parker, Rosemary (March 14, 2010). "Gazette Report Shows Where Most Auto Crashes Occur in Southwest Michigan". Kalamazoo Gazette. OCLC 9940379. Archived from the original on October 12, 2012. Retrieved February 5, 2011.
Mumford, Lou (April 21, 2006). "US 131 Project a 'Go': MDOT Reverses Stance, Leading to Agreement on Four-Lane Highway". South Bend Tribune. p. 1. OCLC 8793233. Archived from the original on April 19, 2013. Retrieved February 5, 2011 – via ProQuest Archiver.
King, Kyla & Luke, Peter (April 21, 2006). "Deal Opens Way for US 131 Extension". The Grand Rapids Press. p. A1. OCLC 9975013.
Meyer, Zlati (August 15, 2010). "You Haven't Lived Here Until... You Take a Summer Drive Along US 131". Detroit Free Press. p. 16A. ISSN 1055-2758. OCLC 10345127, 137343179. Retrieved July 13, 2018 – via Newspapers.com.
Hyde, Charles K. (1993). Historic Highway Bridges of Michigan. Detroit: Wayne State University Press. p. 35. ISBN 0-8143-2448-7. OCLC 27011079. Retrieved September 7, 2019 – via e.
Michigan State Highway Department (June 1, 1927). Official Highway Service Map (Map). [c. 1:810,000]. Lansing: Michigan State Highway Department. OCLC 12701195, 79754957.
Michigan State Highway Department (September 1, 1927). Official Highway Service Map (Map). [c. 1:810,000]. Lansing: Michigan State Highway Department. OCLC 12701195, 79754957.

wwmt.com

Staff writer (January 11, 2011). "New Bypass Considered around Constantine". Kalamazoo, Michigan: WWMT-TV. Archived from the original on July 28, 2011. Retrieved January 28, 2011.