Numbered Highways in the United States
Highways in the United States are split into at least four different types of systems.
- Interstate Highways
The Interstate Highway System is a federally funded and administered (but state-maintained) system of freeways that forms the transportation backbone of the U.S., with millions of Americans relying on it for commutes and freight transport daily. Interstate highways are all constructed to precise standards, designed to maximize high-speed travel safety and efficiency. Interstate Highways also contain auxiliary routes, which are normally assigned a three-digit route number. All Interstate Highways are part of the National Highway System, a network of highways deemed essential to the defense, economy, and mobility of the country.
- U.S. Highways
The U.S. Highway System (officially "United States Numbered Highways") is an older system consisting mostly of surface-level trunk roads, coordinated by the American Association of State Highway and Transportation Officials and maintained by state and local governments. U.S. highways have been relegated to regional and intrastate traffic, as they have been largely supplanted by the Interstate system for long-distance travel except in areas (especially in the west) where the Interstate system is absent or underdeveloped. This has led to the decommissioning and truncation of U.S. Highways that were formerly vital long-haul routes, such as U.S. Route 21 and U.S. Route 66.
- State Highways
Each state also has a state highway system. State highways are of varying standards and quality. Some state highways become so heavily traveled they are built to Interstate Highway standards. Others are so lightly traveled that they are roads of low quality.
- County Highways
The final administrative level in some states is the county-maintained county highway. (The term "parish" is used instead in Louisiana.) County routes vary widely from well-traveled multilane highways to dirt roads into remote parts of the county.
Highways are generally organized by a route number or letter. These designations are generally displayed along the route by means of a highway shield. Each system has its own unique shield design that will allow quick identification to which system the route belongs. Below is a list of the different highway shields used throughout the U.S.

This is an excerpt from the article Numbered Highways in the United States from the Wikipedia free encyclopedia. A list of authors is available at Wikipedia.
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Numbered highways in the United States…
Highways in the United States are split into at least four different types of systems. Interstate Highways The Interstate Highway System is a federally funded and ...
en.wikipedia.org/wiki/Numbered_highways_in_the_United_States
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United States Numbered Highways - Wikipedia, the free encyclopedia
The system of United States Numbered Highways (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways in the United ...
en.wikipedia.org/wiki/United_States_Numbered_Highways
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List of United States Numbered Highways - Wikipedia, the free ...
The following is a list of United States numbered highways. It includes U.S. Numbered Highways both past and present, with the former shaded in gray.
en.wikipedia.org/wiki/List_of_United_States_Numbered_Highways
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US Numbered Highways - The Big Table - U.S. Highways
The U.S. Numbered Highway System is not a Federal program of national ... US Numbered Highways are built and maintained by the individual states. They are ...
www.us-highways.com/usbt.htm
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From Names to Numbers: The Origins of the US Numbered Highway
From Names to Numbers: The Origins of the U.S. Numbered Highway System. by Richard F. Weingroff Information Liaison Specialist Federal Highway ...
www.fhwa.dot.gov/infrastructure/numbers.cfm
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United States Numbered Highways
The system of United States Numbered Highways (often called U.S. Routes or U.S. Highways) is an integrated system of roads and highways in the United ...
www.princeton.edu/~achaney/tmve/wiki100k/docs/United_States_Numbered_Highways.html
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List of United States Numbered Highways
The following is a list of United States numbered highways. It includes U.S. Numbered Highways both past and present, with the former shaded in gray.
www.princeton.edu/~achaney/tmve/wiki100k/docs/List_of_United_States_Numbered_Highways.html
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Is there any rhyme or reason to how US interstate highways
States do this numbering and can choose between two methods: The consecutive ... NV; and Pierre, SD. Source: U.S. DOT, Federal Highway Administration ...
science.howstuffworks.com/engineering/civil/question656.htm
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snopes.com: U.S. Highway Numbering
Apr 1, 2011 ... Are U.S. Interstate highways numbered according to a pattern?
www.snopes.com/autos/law/highways.asp
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Guide to Understanding the US Highway Numbering System, Part 1
Nov 1, 2007 ... The Interstate Highway System uses a standardized numbering system and geographic layout to designate the interstate routes. The routes ...
voices.yahoo.com/guide-understanding-us-highway-numbering-system-628698.html
Search results for "Numbered Highways in the United States"
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Numbered Highways in the United States in science
List of numbered routes in Massachusetts - Wikipedia, the free ...
The section between U.S. Route 6 and I-195 carries the initial ... Field Road at the Boston University Bridge (Route 2) ...
Interstate 990 - Wikipedia, the free encyclopedia
The highway serves as a connection between Buffalo, the University at Buffalo, and ... I-990 is the highest numbered Interstate Highway in the United States.
State highways in Virginia - Wikipedia, the free encyclopedia
The state highway system of the U.S. state of Virginia is a network of roads ... numbered by the American Association of State Highway and Transportation Officials. ... Roadways at many of Virginia's state institutions, such as state universities ...
Maryland highway system - Wikipedia, the free encyclopedia
In addition to the nationally-numbered Interstate Highways and U.S. ... include streets on state university campuses, access roads to state parks and state forests, ...
List of Minnesota state highways - Wikipedia, the free encyclopedia
The organized system of Minnesota State Highways (typically abbreviated as MN ... are numbered to avoid conflicting with Interstate Highways and US Highways. ...... and University Avenue in St. Paul and West St. Paul (MN 952, numbered for ...
List of primary state highways in Virginia - Wikipedia, the free ...
Primary State Highways in the U.S. state of Virginia, are numbered and maintained by the Virginia Department of Transportation as a system of state highways.
Lincoln Highway - Wikipedia, the free encyclopedia
Most of the 1928 Lincoln Highway route became US Route 30, with portions .... Today, use Interstate 80 to connect from University Avenue down to the San ..... Board on Interstate Highways, which proposed a numbered U.S. Highway system ...
Michigan State Trunkline Highway System - Wikipedia, the free ...
Highway markers for Interstate 75, U.S. Highway 23 and M-28 .... Many extinct U.S. Highways in Michigan have left an M-numbered highway with the same ...... American Midland Naturalist (Notre Dame, IN: University of Notre Dame) 153 (1): ...
From Names to Numbers: The Origins of the US Numbered Highway
From Names to Numbers: The Origins of the U.S. Numbered Highway System ..... He continued his studies at Harvard University, where he was a 1901 cum ...
The Interstate System - HKN
Though the adoption of the US highway system in 1925 brought some ... The numbering convention adopted for the Interstate system is as follows: TWO DIGIT * ...
Books on the term Numbered Highways in the United States
Urban Transportation Planning in the United States: History, ...
Urban Transportation Planning in the United States: History, ...
Edward Weiner, 2013
The concept of a continuous national system of highways was reinforced in the Federal-Aid Highway Act of 1925 with the requirement for a US numbered highway system composed of important through routes extending entirely across the ...
Manual on Uniform Traffic Control Devices: Inserts Only
Manual on Uniform Traffic Control Devices: Inserts Only
Department of Transportation, Federal Highway Administration, 2003
Section 2D.09 Numbered Highway Systems Support: The purpose of numbering and signing highway systems is to identify routes and facilitate travel. The Interstate and United States (U.S.) highway systems are numbered by the American ...
Development of Google searches


Blog posts on the term
Numbered Highways in the United States
From Names to Numbers: The Origins of the U.S. Numbered Highway System - Highway History - FHWA - BatesLine linkblog
www.batesline.com/linkblog/2013/06/from_names_to_numbers_the_orig.html
Birth of the U.S. Numbered Highway System | AAA TravelViews | AAA's Travel Blog
AAA history and information of the U.S. numbered highway system.
ww3.aaa.com/travelviews/2013/03/19/birth-of-the-u-s-numbered-highway-system/
Us 40 Puzzle - Letter In Ameriacan Road - Vol. Xi, No. 2 - National Road / U.S. 40 - AMERICAN ROAD® FORUM—the ultimate road trip planning community. Copyright AMERICAN ROAD, LLC 2006-2011
Us 40 Puzzle - Letter In Ameriacan Road - Vol. Xi, No. 2 - posted in National Road / U.S. 40: Here is the answer to the question about U.S. 40 in the subject issue. The so-called 1928 Northern Route of the Lincoln Highway followed U.S. 40 from Sacramento to Oakland. It is interesting, however, that from November 11, 1926 until June 8, 1931 (effective January 1, 1932), U.S. 40 was still officially routed through Benicia and Martinez. Some of the route books for that perio...
americanroadmagazine.com/forum/index.php?showtopic=1934
US Senate recognizes the Lincoln Highway | Lincoln Highway News
News about America's premiere coast-to-coast highway.
lincolnhighwaynews.wordpress.com/2013/06/28/us-senate-recognizes-the-lincoln-highway/
Joe's Mulligan Of Life: Part Of The Historical Lincoln Highway In Dublin
The white bridge has been here forever. I didn't see a plaque, but I would guess it is at least 80 years old, long before anything was out here.
joesmulliganoflife.blogspot.com/2013/07/part-of-historical-lincoln-highway-in.html
The Amateur Planner: Google Maps has some work to do on route hierarchy
Last week we examined some of the changes—many of which I think are positive—to the Google Maps interface. However, Google Maps has fallen in to an old trap which harms the overall product: they unilaterally classify US Routes as a higher status road type.
amateurplanner.blogspot.com/2013/07/google-maps-has-some-work-to-do-on.html
Day 20 - Lincoln Highway Centennial Caravan at DennyGibson.com
www.dennygibson.com/lhcc2013/day20/
Difference between revisions of "Road Naming (USA)" - waze
www.waze.com/wiki/index.php?title=Road_Naming_(USA)&diff=40214&oldid=40126
Popular Wikipedia Articles: United States Numbered Highways
United States Numbered Highways The system of United States Numbered Highways (often called U. S.
top-best-articles.blogspot.com/2013/01/united-states-numbered-highways.html
Colfax Avenue: 40th Parallel
Colfax Avenue is the longest commercial street in the USA, and truly one of the most unique streets anywhere. ColfaxAvenue.com is the definitive guide to the heart and soul of Colfax Avenue, which runs through Golden, Lakewood, Denver, and Aurora, Colorado.
www.colfaxavenue.com/2013/03/40th-parallel.html
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