List of unsigned Interstate Highways

Some auxiliary Interstate Highways
Interstate Highway System
The Dwight D. Eisenhower National System of Interstate and Defense Highways, , is a network of limited-access roads including freeways, highways, and expressways forming part of the National Highway System of the United States of America...

are not signed

Unsigned highway

An unsigned highway is a highway that has been assigned a route number, but does not bear conventional road markings that would normally be used to identify the route with that number...

, typically because the routes are already known by another name, and marking them could confuse motorists. A small fraction of three-digit Interstates, especially very short ones (in terms of physical length), are not signed.

Interstate	Vicinity	Description
I-305	Sacramento, CA Sacramento, California Sacramento is the capital city of the U.S. state of California and the county seat of Sacramento County. It is located at the confluence of the Sacramento River and the American River in the northern portion of California's expansive Central Valley. With a population of 466,488 at the 2010 census,...	Signed as US 50 U.S. Route 50 U.S. Route 50 is a major east–west route of the U.S. Highway system, stretching just over from Ocean City, Maryland on the Atlantic Ocean to West Sacramento, California. Until 1972, when it was replaced by Interstate Highways west of the Sacramento area, it extended to San Francisco, near... and Business Loop I-80. It was part of I-80 Interstate 80 Interstate 80 is the second-longest Interstate Highway in the United States, following Interstate 90. It is a transcontinental artery running from downtown San Francisco, California to Teaneck, New Jersey in the New York City Metropolitan Area... until October 1983.
I-910	New Orleans, LA New Orleans, Louisiana New Orleans is a major United States port and the largest city and metropolitan area in the state of Louisiana. The New Orleans metropolitan area has a population of 1,235,650 as of 2009, the 46th largest in the USA. The New Orleans – Metairie – Bogalusa combined statistical area has a population...	Signed as Business Route US 90 U.S. Route 90 Business (New Orleans, Louisiana) U.S. Highway 90 Business is a business route of U.S. Highway 90 in and near New Orleans, Louisiana, United States. Unlike a standard business route, it is built to higher standards than the segment of U.S. 90 that it parallels, with over half built to freeway standards and designated Interstate 910... .
I-315	Great Falls, MT Great Falls, Montana Great Falls is a city in and the county seat of Cascade County, Montana, United States. The population was 58,505 at the 2010 census. It is the principal city of the Great Falls, Montana Metropolitan Statistical Area, which encompasses all of Cascade County...	Signed as Business Loop I-15.
I-124	Chattanooga, TN Chattanooga, Tennessee Chattanooga is the fourth-largest city in the US state of Tennessee , with a population of 169,887. It is the seat of Hamilton County...	Signed as US 27 U.S. Route 27 U.S. Route 27 is a north–south United States highway in the southern and midwestern United States. The southern terminus is at US 1 in Miami, Florida. The northern terminus is at Interstate 69 in Fort Wayne, Indiana... .
I-444	Tulsa, OK Tulsa, Oklahoma Tulsa is the second-largest city in the state of Oklahoma and 46th-largest city in the United States. With a population of 391,906 as of the 2010 census, it is the principal municipality of the Tulsa Metropolitan Area, a region with 937,478 residents in the MSA and 988,454 in the CSA. Tulsa's...	Signed as US 75 U.S. Route 75 U.S. Route 75 is a north–south U.S. Highway. The highway's northern terminus is in Kittson County, Minnesota, at the Canadian border, where it continues as Manitoba Highway 75 on the other side of a closed border crossing. Its southern terminus is at Interstate 30 and Interstate 45 in Dallas,... .
I-345	Dallas, TX Dallas, Texas Dallas is the third-largest city in Texas and the ninth-largest in the United States. The Dallas-Fort Worth Metroplex is the largest metropolitan area in the South and fourth-largest metropolitan area in the United States...	Signed US 75 U.S. Route 75 U.S. Route 75 is a north–south U.S. Highway. The highway's northern terminus is in Kittson County, Minnesota, at the Canadian border, where it continues as Manitoba Highway 75 on the other side of a closed border crossing. Its southern terminus is at Interstate 30 and Interstate 45 in Dallas,... (northbound) I-45 Interstate 45 Interstate 45 is an intrastate Interstate Highway located entirely within the U.S. state of Texas. It connects the cities of Dallas and Houston, continuing southeast from Houston to Galveston over the Galveston Causeway to the Gulf of Mexico... (southbound).
I-478	New York City, NY	Signed as the Brooklyn-Battery Tunnel Brooklyn-Battery Tunnel Interstate 478s entire length consists of the Brooklyn–Battery Tunnel and its approaches. Its south end is at Interstate 278, and its north end is at NY 9A .... .
I-878	New York City, NY	Signed as SR 878.
I-480 N	Cleveland, OH Cleveland, Ohio Cleveland is a city in the U.S. state of Ohio and is the county seat of Cuyahoga County, the most populous county in the state. The city is located in northeastern Ohio on the southern shore of Lake Erie, approximately west of the Pennsylvania border...	Signed as a connection between I-480 Interstate 480 (Ohio) Interstate 480 is a loop highway that connects the Ohio Turnpike with suburban Cleveland, Ohio. The highway is officially designated the Outerbelt South Freeway, but it is rarely referred to by that name.... and I-271/US 422 U.S. Route 422 U.S. Route 422 is a long spur route of US 22 split into two segments in the U.S. states of Ohio and Pennsylvania. The western spur begins in downtown Cleveland, Ohio, and ends at Ebensburg, Pennsylvania... .
I-580 Interstate 580 (Nevada) Interstate 580 in Nevada is an unsigned Interstate Highway in northwestern Nevada. It runs concurrently with U.S. Route 395 in Reno, for approximately five miles between Interstate 80 and Neil Road. Two separate highway construction projects are currently underway along the US 395 corridor that...	Reno, NV Reno, Nevada Reno is the county seat of Washoe County, Nevada, United States. The city has a population of about 220,500 and is the most populous Nevada city outside of the Las Vegas metropolitan area...	Signed as US 395 U.S. Route 395 U.S. Route 395 is a U.S. Route in the western United States. The southern terminus of the route is in the Mojave Desert at Interstate 15 near Hesperia. The northern terminus is at the Canadian border near Laurier, where the road becomes Highway 395 upon entering British Columbia. At one time, the... . When the US 395 freeway is finished to Carson City Carson City, Nevada The Consolidated Municipality of Carson City is the capital of the state of Nevada. The words Consolidated Municipality refer to a series of changes in 1969 which abolished Ormsby County and merged all the settlements contained within its borders into Carson City. Since that time Carson City has... , this route will be signed.
I-194 Interstate 194 (North Dakota) The Bismarck Expressway is a state highway in Mandan and Bismarck, North Dakota, United States. It does not have a signed designation, but carries two unsigned highways: Interstate 194 from its west end at exit 156 of Interstate 94 to Interstate 94 Business in Mandan, and North Dakota Highway 810...	Bismarck, ND Bismarck, North Dakota Bismarck is the capital of the U.S. state of North Dakota and the county seat of Burleigh County. It is the second most populous city in North Dakota after Fargo. The city's population was 61,272 at the 2010 census, while its metropolitan population was 108,779...	Signed as SH 810.
I-495 Interstate 495 (Maine) Interstate 495 is the unsigned designation for the Falmouth Spur, a short freeway connecting Interstate 95 with Interstate 295 and U.S. Route 1 north of Portland, Maine, United States. As part of the Maine Turnpike, the main line of which carries Interstate 95, I-495 is a toll road. The spur has...	Falmouth, ME Falmouth, Maine Falmouth is a town in Cumberland County, Maine, United States. The population was 11,185 at the 2010 census. It is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area....	Signed as a connection between I-95 Interstate 95 Interstate 95 is the main highway on the East Coast of the United States, running parallel to the Atlantic Ocean from Maine to Florida and serving some of the most populated urban areas in the country, including Boston, Providence, New Haven, New York City, Newark, Philadelphia, Baltimore,... and I-295 Interstate 295 (Maine) Interstate 295 is a -long connector in the U.S. state of Maine from I-95 in Scarborough to I-95 in West Gardiner.-Route description:... . It was redesignated from part of I-95 on January 5, 2004 Also known as the Falmouth Spur of the Maine Turnpike, with mile markers starting with the prefix FS-.
I-595 Interstate 595 (Maryland) Interstate 595 is an unsigned number for a section of the John Hanson Highway from Interstate 495 east of Washington, D.C. to Maryland Route 70 at Annapolis, Maryland....	Annapolis, MD Annapolis, Maryland Annapolis is the capital of the U.S. state of Maryland, as well as the county seat of Anne Arundel County. It had a population of 38,394 at the 2010 census and is situated on the Chesapeake Bay at the mouth of the Severn River, south of Baltimore and about east of Washington, D.C. Annapolis is...	Signed as US 50 U.S. Route 50 U.S. Route 50 is a major east–west route of the U.S. Highway system, stretching just over from Ocean City, Maryland on the Atlantic Ocean to West Sacramento, California. Until 1972, when it was replaced by Interstate Highways west of the Sacramento area, it extended to San Francisco, near... from the Washington, DC, area east to Annapolis, Maryland.
I-695 Interstate 695 (District of Columbia) Interstate 695 is the unsigned designation for the 1.39-mile Southeast Freeway in Washington, D.C. It runs from Interstate 395 south of the United States Capitol building east past the north end of Interstate 295 to Pennsylvania Avenue at Barney Circle, just northwest of the John Philip Sousa...	Washington, D.C. Washington, D.C. Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....	Signed as a short connection from I-395 Interstate 395 (District of Columbia-Virginia) Interstate 395 in Washington, D.C., and Virginia is a 13 mile long spur route that begins at a junction with Interstate 95 in Springfield, Virginia and ends in northwest Washington, D.C. It passes underneath the National Mall near the United States Capitol and ends at a junction with U.S... to I-295 Interstate 295 (District of Columbia) Interstate 295 in the U.S. state of Maryland and in Washington, D.C. is a spur route connecting I-95/I-495 and Maryland Route 210 on the Potomac River to Interstate 695 in downtown Washington.-Route description:Although I-295 technically begins at the Capital Beltway , a pair of mainline... .
I-296	Grand Rapids, MI Grand Rapids, Michigan Grand Rapids is a city in the U.S. state of Michigan. The city is located on the Grand River about 40 miles east of Lake Michigan. As of the 2010 census, the city population was 188,040. In 2010, the Grand Rapids metropolitan area had a population of 774,160 and a combined statistical area, Grand...	Signed as US 131 U.S. Route 131 US Highway 131 is a north–south United States Highway, of which all but 0.67 miles of its 266.82 miles are within the state of Michigan. The highway starts in rural Indiana south of the state line as a state road connection to the Indiana Toll Road... .

External links

Kurumi - 3-digit Interstate Highways

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