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Numbered highways in the United States
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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.
- State Highways
- Each state also has a state highway system (see also: State highway#United States). State highways are of varying standards and quality. Some state highways become so heavily traveled they are built to Interstate standards; others are so lightly traveled they are roads of minimal quality.
- County Highways
- The final administrative level in some states is the county-maintained county highway. County routes vary widely from well-travelled expressways to dirt access 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.
Shield list
Interstate Highways
Interstate Highway
Shown: Interstate 95
Interstate Highway, 3-digit variant
Shown: Interstate 695
Interstate Highway, state-name variant
Shown: Interstate 80 in California
Hawaii Interstate Highway
Shown: Interstate H-1
Alaska Interstate Highway**
Shown: Interstate A-1
Puerto Rico Interstate Highway**
Shown:PRI-1
Business Loop Highway
Shown: Interstate 96 Business (Lansing, Michigan)
Business Spur Highway
Shown: Interstate 75 Business (Sault Ste. Marie, Michigan)
** Note that the Alaska and Puerto Rico Interstates exist but are not signed as such - the above shields are theoretical only, and based on the real-life Hawaii Interstate Highways (H1, H2, H3, and H201), which are signed.
U.S. Numbered Highways
United States Numbered Highways
Shown: U.S. Route 30
United States Numbered Highways, California variant
Shown: U.S. Route 50 in California
United States Numbered Highways, Old Style variant
Shown: U.S. Route 66 in Arizona
Suffixed United States Numbered Highways
Shown: U.S. Route 25E
Historic United States Numbered Highways
Shown: Historic U.S. Route 66
Historic United States Numbered Highways, California variant
Shown: Historic U.S. Route 99 in California
Business Route
Shown: U.S. Route 1 Business
Bypass Route
Shown: U.S. Route 60 Bypass
Business Route, Maryland variant
Shown: U.S. Route 13 Business in Maryland
Truck Route
Shown: U.S. Route 9 Truck
Alternate Route
Shown: U.S. Route 40 Alternate
Scenic Route
Shown: U.S. Route 412 Scenic
Generic routes
Generic county route
Shown: County Route 64 in Baldwin County, Alabama
Generic county route (Alternate shield)
Shown: County Route 7 in St. Louis County, Minnesota
Generic Forest Route
Shown: Forest Route 7
Generic Indian Route
Shown: Indian Route 18
Generic U.S. Bicycle Route
Shown: U.S. Bicycle Route 76
Generic U.S. Bicycle Route (Alternate shield)
Shown: U.S. Bicycle Route 13
State highways and other similar systems
Many state highway markers are designed to suggest the geographic shape of the state or some other state symbol such as its flag. Most of the others are generically rectangular or some other neutral shape. Pennsylvania uses the unique shape of a keystone, designating "The Keystone State".
State Routes in Alabama
Shown: State Route 67
Alaska Routes
Shown: Alaska Route 5
State Route in Arizona
Shown: State Route 48
State Highway in Arkansas
Shown: State Highway 87
State Route in California
Shown: State Route 2
State Highways in Colorado
Shown: State Highway 62
Routes in Connecticut
Shown: Route 16
State Routes in Delaware
Shown: State Route 1
District of Columbia Routes
Shown: District of Columbia Route 295
State Roads in Florida
Shown: State Road 13
State Roads in Florida, tolled
Shown: State Road 869
State Route in Georgia
Shown: State Route 3
Route in Hawaii
Shown: Route 66
State Highway in Idaho
Shown: State Highway 41
Illinois Route
Shown: Illinois Route 19
State Roads in Indiana
Shown: State Road 67
State Highway in Iowa*
Shown: Iowa Highway 92
State Highway in Kansas*
Shown: K-99
State Highway in Kentucky*
Shown: State Highway 1
State Highway in Louisiana*
Shown: Louisiana Highway 3021
State Route in Maine
Shown: State Route 9
Maryland state highway
Shown: Maryland Route 2
Route in Massachusetts
Shown: Route 24
State Trunkline in Michigan
Shown: M-28
Highway in Minnesota
Shown: Highway 62
Highway in Mississippi
Shown: Mississippi Highway 1
Route in Missouri
Shown: Route 43
Route in Missouri, supplemental variant
Shown: Route K
Highway in Montana
Shown: Montana State Highway 80
Secondary Highway in Montana
Shown: Montana Secondary Highway 201
State Highway in Nebraska
Shown: Nebraska Highway 2
State Route in Nevada
Shown: State Route 28
New Hampshire Route
Shown: New Hampshire Route 16
Route in New Jersey
Shown: Route 33
State Highway in New Mexico*
Shown: New Mexico State Highway 516
Route in New York
Shown: New York State Route 15
Parkway in upstate New York
Shown: Bronx River Parkway
Parkway on Long Island, New York
Shown: Meadowbrook Parkway
State Highway in North Carolina
Shown: North Carolina Highway 130
State Highways in North Dakota*
Shown: State Highway 23
State Route in Ohio
Shown: State Route 2
State Highway in Oklahoma, new shield
Shown: State Highway 1
State Highway in Oklahoma, old shield
Shown: State Highway 1
Route in Oregon
Shown: Oregon Route 58
State Route in Pennsylvania*
Shown: Pennsylvania Route 39
Tolled State Routes in Pennsylvania, new shield
Shown: PA Turnpike 576
Tolled State Routes in Pennsylvania, new shield with colors inverted
Shown: PA Turnpike 43
Tolled State Routes in Pennsylvania, old shield
Shown: Toll 60
Route in Rhode Island
Shown: Route 3
State Highway in South Carolina, new shield
Shown: South Carolina Highway 462
State Highway in South Carolina, old shield
Shown: South Carolina Highway 64
State Highway in South Dakota
Shown: South Dakota Highway 10
State Route in Tennessee
Shown: State Route 14
Secondary State Route in Tennessee
Shown: Secondary State Route 14
State Highway in Texas
Shown: State Highway 6
State Highway in Texas, tolled
Shown: State Highway 121
State Highway Loop in Texas
Shown: Loop 1
State Highway Spur in Texas
Shown: Spur 366
State Beltway in Texas
Shown: Texas Beltway 8
Farm to Market Road in Texas
Shown: Farm to Market Road 1960
Ranch to Market Road in Texas
Shown: Ranch to Market Road 2243
Park Road in Texas
Shown: Park Road 5
Recreational Road in Texas
Shown: Recreational Road 2
State NASA Road in Texas
Shown: NASA Road 1
Old San Antonio Road in Texas
Shown: Texas OSR the first road in Texas
State Route in Utah
Shown: State Route 201
Vermont Route
Shown: Vermont Route 15
Vermont Route, "state numbered town highway" variant
Shown: Locally maintained Vermont Route 1
Virginia State Route
Shown: State Route 7
Virginia State Highway, secondary or frontage state highway
Shown: State Route 7100
State Route in Washington
Shown: State Route 202
Primary State Highways in Washington
Shown: PSH 1
West Virginia State Route*
Shown: West Virginia Route 46
West Virginia County Route
Shown: County Route 5
Wisconsin State Trunk Highway
Shown: State Trunk Highway 29
Wisconsin County Trunk Highway
Shown: County Trunk Highway L
State Highway in Wyoming*
Shown: Wyoming Highway 24
- A * means that the official name is unconfirmed.
Territorial Highways
American Samoa Highway*
Shown: Territorial Route 001
Guam Highways*
Shown: Guam Highway 8
Puerto Rico Primary Highway*
Shown: Puerto Rico Primary Highway 1
Puerto Rico Urban Primary Highway*
Shown: Puerto Rico Urban Primary Highway 1
Puerto Rico Secondary Highway*
Shown: Puerto Rico Secondary Highway 970
Puerto Rico Tertiary Highway*
Shown: Puerto Rico Tertiary Highway 3
U.S. Virgin Islands Highway*
Shown: U.S. Virgin Islands Highway 10
- A * means that the official name is unconfirmed.
See also
External links
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