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The highway system of the United States is a network of interconnected state, U.S., and Interstate highways. Each of the fifty states, the District of Columbia, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands, and the U.S. Virgin Islands own and maintain a part of this vast system, including U.S. and Interstate highways, which are not owned or maintained at the federal level.
Interstate Highways have the highest speed limits and the highest traffic numbers. Interstates are numbered in a grid: even-numbered routes for east–west routes (with the lowest numbers along Mexico and the Gulf of Mexico), and odd-numbered routes are north–south routes (with the lowest numbers along the Pacific Ocean). Three-digit Interstates are, generally, either beltways or spurs of their parent Interstates (for example, Interstate 510 is a spur into the city of New Orleans, Louisiana, and is connected to Interstate 10).
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U.S. Numbered Highways are the original interstate highways, dating back to 1926. U.S. Highways are also numbered in a grid: even numbered for east–west routes (with the lowest numbers along Canada) and odd numbered for north–south routes (with the lowest numbers along the Atlantic Ocean). Three-digit highways, also known as "child routes," are branches off their main one- or two-digit "parents" (for example, U.S. Route 202 is a branch of U.S. Route 2). However, US 101, rather than a "child" of US 1, is considered a "mainline" U.S. Route.
More about the U.S. Highway System...
State highways are the next level in the hierarchy. Each state and territory has its own system for numbering highways, some more systematic than others. Each state also has its own design for its highway markers; the number in a circle is the default sign, but many choose a different design connected to the state, such as an outline of the state with the number inside. Many states also operate a system of county highways.
Scenic byways can be designated over any classification of road in the United States. There are the National Scenic Byways, National Forest Scenic Byways and Bureau of Land Management Back Country Byways at the national level. Most states have their own system for designating byways, some more systematic than others. Native American tribes may designate byways as well.
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Interstate 205 (I-205) is an auxiliary Interstate Highway in the Portland metropolitan areaofOregon and Washington, United States. The north–south freeway serves as a bypass routeofI-5 along the east side of Portland, Oregon, and Vancouver, Washington. It intersects several major highways and serves Portland International Airport.
The freeway is 37 miles (60 km) long and connects to I-5 at both of its termini: to the south in Tualatin, Oregon, and to the north in Salmon Creek, Washington. I-205 is named the Veterans Memorial Highway and East Portland Freeway No. 64 in Oregon (see Oregon highways and routes). From Oregon City to Vancouver, the corridor is paralleled by a multi-use bicycle and pedestrian trail, as well as portions of the MAX Light Rail system between Clackamas and northeastern Portland. (Full article...)
M-6, or the Paul B. Henry Freeway, is a 19.7-mile-long (31.7 km) east–west freeway and state trunkline highway in the United States that serves portions of southern Kent and eastern Ottawa counties south of Grand Rapids, Michigan. Although the freeway is named for Paul B. Henry, local residents and the press continue to use the original name, South Beltline as well on occasion. The freeway connects Interstate 196 (I-196) on the west with I-96 on the east. M-6 also provides a connection to U.S. Highway 131 (US 131) in the middle of its corridor while running through several townships on the south side of the Grand Rapids metropolitan areainWestern Michigan. Each end is in a rural area while the central section has suburban development along the trunkline.
The freeway was originally conceived in the 1960s. It took 32 years to approve, plan, finance, and build the freeway from the time that the state first authorized funding in 1972 to the time of the ribbon-cutting ceremony in 2004 that opened the South Beltline to traffic. The project cost around $700 million or around $35 million per mile (approximately $22 million per kilometer). Initial construction started in November 1997, with the first phase opened in November 2001. The full freeway was opened in November 2004. The first phase of construction was completed in asphalt, while the second and third phases were built in concrete. The project was built with two firsts: the first single-point urban interchange (SPUI; /ˈspuːiː/) in Michigan, and a new technique to apply the pavement markings, embedding them into the concrete to reduce the chance of a snowplow scraping them off. In advance of the opening of the freeway to traffic, the Michigan Department of Transportation (MDOT) allowed the public to walk or bike the South Beltline in an open-house event called the "Southbelt Shuffle". (Full article...)
US Highway 16 (US 16), also called Grand River Avenue for much of its length in the state, was one of the principal roads prior to the post-World War II construction of freeways in the state of Michigan. Before the creation of the United States Numbered Highway System in 1926, the highway had been designated as a state highway numbered M-16. The modern route of Grand River Avenue cuts across the Lower Peninsula in a northwest–southeast fashion from near Grand RapidstoDetroit. Before the late 1950s and early 1960s, US 16 followed other roads between Muskegon and Grand Rapids, and then Grand River Avenue through Lansing to Detroit. In the years immediately preceding the creation of the Interstate Highway System, US 16 was shifted from older roads to newer freeways. Later, it was co-designated as an Interstate. When the gap in the freeway was filled in around Lansing, the US 16 designation was decommissioned in the state. The freeway was solely designated Interstate 96 (I-96) east of Grand Rapids and I-196 west of that city.
The original pathway along the Grand River Avenue corridor was an Indian trail, a footpath used by the native population. The first European settlers to the area now known as Michigan also used this trail and in some areas enlarged it for the passage of wagons. In Detroit, Grand River is one of five major avenues (along with Woodward, Michigan, Gratiot, and Jefferson) planned by Judge Augustus Woodward in 1805 that extended from Downtown Detroit in differing radial directions; Grand River Avenue extends northwesterly from the city's downtown. In the middle of the 19th century, the trail was expanded into a plank road that formed the basis for one of the first state trunkline highways as M-16 in the early 20th century. Later, the highway was rerouted to replace M-126 and create M-104. Current segments of the roadway are still part of the state highway system as sections of M-5, M-11, M-43orbusiness loops off I-96. The portion of Grand River Avenue in Detroit between I-96 and the intersection with Cass Avenue and Middle Street in Downtown Detroit is an unsigned state trunkline, sometimes referred to as Old Business Spur I-96 (Old BS I-96). (Full article...)
M-35 is a state trunkline highway in the Upper Peninsula (UP) of the US state of Michigan. It runs for 128 miles (206 km) in a general north–south direction and connects the cities of Menominee, Escanaba, and Negaunee. The southern section of M-35 in Menominee and Delta counties carries two additional designations; M-35 forms a segment of the Lake Michigan Circle Tour, and it is the UP Hidden Coast Recreational Heritage Trail, which is a part of what is now called the Pure Michigan Byways Program. Along the southern section, the highway is the closest trunkline to the Green Bay, a section of Lake Michigan. The northern section of the highway turns inland through sylvan areas of the UP, connecting rural portions of Delta and Marquette counties.
M-35 is an original state trunkline that was first signposted in 1919, that was intended to run from Menominee in the south to near Big Bay in the north, before it was to turn toward L'Anse to end at Ontonagon. However, the section through the Huron Mountains in northern Marquette and Baraga counties was never built. Automobile pioneer Henry Ford helped halt this construction to gain favor with and membership into the exclusive Huron Mountain Club. Some discontinuous sections were later ceded to local control. The northern segment of the route between Ontonagon and Baraga was retained as a discontinuous segment of the highway; this northern segment was later redesignated as another state trunkline. The northern end was later rerouted out of the City of Negaunee into Negaunee Township to avoid mining activity near Palmer. (Full article...)
New York State Route 175 (NY 175) is an east–west state highway located entirely within Onondaga County, New York, in the United States. The 15.46-mile (24.88 km) route begins at an intersection with U.S. Route 20 (US 20) east of the village of Skaneateles and passes through the village of Marcellus before ending at a junction with US 11inSyracuse. The highway was designated in the 1930 renumbering of state highways in New York.
The section of NY 175 from the town of Marcellus to the end of the NY 173 concurrency is part of the Seneca Turnpike, which was established in 1800 and dissolved in 1852. This portion of the Seneca Turnpike was instrumental in the development of the villages of Skaneateles and Marcellus. When designated in 1930, NY 175 was on a rural stretch of highway connecting Marcellus to Onondaga, and brought about an increase in population and development along its route. (Full article...)
Interstate 82 (I-82) is an Interstate Highway in the Pacific Northwest region of the United States that travels through parts of Washington and Oregon. It runs 144 miles (232 km) from its northwestern terminus at I-90inEllensburg, Washington, to its southeastern terminus at I-84inHermiston, Oregon. The highway passes through Yakima and the Tri-Cities, and is also part of the link between Seattle and Salt Lake City, Utah. I-82 travels concurrently with U.S. Route 97 (US 97) between Ellensburg and Union Gap; US 12 from Yakima to the Tri-Cities; and US 395 from KennewicktoUmatilla, Oregon.
I-82 primarily serves the Yakima Valley agricultural region, following the Yakima and Columbia rivers southeastward to the Tri-Cities. The highway enters the valley from the north by crossing the Manastash Ridge, which separates Yakima from the Kittitas Valley. I-82 bypasses the Tri-Cities by traveling southwest around Richland and Kennewick and then turns south to cross the Columbia River on the Umatilla Bridge. Its only auxiliary route, I-182, connects the highway to Richland and Pasco in the Tri-Cities. (Full article...)
US Highway 45 (US 45) is a part of the United States Numbered Highway System that runs from Mobile, Alabama, to the Upper Peninsula (UP) of the state of Michigan. The highway forms a part of the state trunkline highway system that is maintained by the Michigan Department of Transportation (MDOT). It enters the state from Wisconsin south of Watersmeet, ending at an intersection with Ontonagon Street in Ontonagon. In between, the roadway crosses the UP running for approximately 54+3⁄4 miles (88.1 km) through the Ottawa National Forest and parallel to the Ontonagon River.
The highway dates back to the 1930s in Michigan. At the time it was extended into the state, it replaced sections of M-26 and M-35. An eight-mile (13 km) segment was significantly reconstructed in the late 1950s, and an alignment change in the 1970s moved the routing of US 45 near Rockland before it was reversed soon afterwards. A segment of roadway that formerly carried US 45 is the site of the Paulding Light, a local phenomenon whose origins were scientifically described in 2010. (Full article...)
Interstate 496 (I-496) is an auxiliary Interstate Highway that passes through downtown Lansing in the US state of Michigan. Also a component of the State Trunkline Highway System, the freeway connects I-96 to the downtown area. It has been named the R.E. Olds Freeway (sometimes just Olds Freeway) for Ransom E. Olds, the founder of Oldsmobile and the REO Motor Car Company. I-496 runs east–west from I-96/I-69 near the downtown area and north–south along a section that runs concurrently with US Highway 127 (US 127). The trunkline also passes a former assembly plant used by Oldsmobile and runs along or crosses parts of the Grand and Red Cedar rivers.
Construction of I-496 started in 1963, and the freeway opened on December 18, 1970. Segments of the freeway south of downtown Lansing were built in the location of a historically black neighborhood. This neighborhood was formed based on the segregationist practices of the early 20th century. Community leaders worked for different housing opportunities for the black residents displaced by I-496 rather than fight the freeway. As the trunkline neared completion, competing proposals to name it resulted in two similar, but separate designations applied to I-496. The city originally approved one name in honor of a former mayor. The local historical society proposed that the state name it as a memorial to Olds after the demolition of the Olds Mansion. The city renamed it the Oldsmobile Expressway, the name under which it opened in December 1970. Two years later, the Michigan Legislature restored its preferred name and it has been the Olds Freeway since. (Full article...)
Maryland Route 36 (also known as MD 36orRoute 36) is a 29.43-mile (47.36 km) state highway located in Allegany County, Maryland, United States. MD 36's southern terminus is at the West Virginia Route 46 (WV 46) bridge in Westernport and its northern terminus at U.S. Route 40 Alternate (US 40 Alt.) near Cumberland. Between Westernport and Frostburg, it is known as Georges Creek Road, and from Frostburg to Cumberland it is known as Mount Savage Road. Like the majority of Maryland state highways, MD 36 is maintained by the Maryland State Highway Administration (MDSHA).
MD 36 serves as the main road through the Georges Creek Valley, a region which is historically known for coal mining, and has been designated by MDSHA as part of the Coal Heritage Scenic Byway. MD 36 is the main road connecting the towns of Westernport, Lonaconing, and Midland in southwestern Allegany County, as well as Frostburg, Mount Savage, and Corriganville in northwestern Allegany County. (Full article...)
US Highway 31 (US 31) is a part of the United States Numbered Highway System that runs from Alabama to the Lower Peninsula of the US state of Michigan. In Michigan, it is a state trunkline highway that runs from the Indiana–Michigan state line at Bertrand Township north to its terminus at Interstate 75 (I-75) south of Mackinaw City. Along its 355.2-mile-long (571.6 km) route, US 31 follows the Michigan section of the St. Joseph Valley Parkway as well as other freeways and divided highways northward to Ludington. North of there, the trunkline is a rural undivided highway through the Northern Michigan tourist destinations of Traverse City and Petoskey before terminating south of Mackinaw City. Along its route, US 31 has been dedicated in memory of a few different organizations, and sections of it carry the Lake Michigan Circle Tour (LMCT) moniker. Four bridges used by the highway have been recognized for their historic character as well.
The first highways along the route of the modern US 31 corridor were the West Michigan Pike, an auto trail from 1913, and later a pair of state trunklines (the original M-11 and M-58) in 1919. These state highways were redesignated US 31 on November 11, 1926, when the US Highway System was approved. Since then, the highway has been realigned in places. The highway crossed the Straits of Mackinac by ferry for about a decade in the 1920s and 1930s before the Mackinac Bridge was built, connecting to US 2 north of St. Ignace. Later, sections were converted into freeways starting in the 1950s. These segments opened through the subsequent decades with the last one opening in 2022. Future plans by the Michigan Department of Transportation (MDOT) include a bypass of Grand Haven. (Full article...)
Interstate 94 (I-94) is a part of the Interstate Highway System that runs from Billings, Montana, to the Lower Peninsula of the US state of Michigan. In Michigan, it is a state trunkline highway that enters the state south of New Buffalo and runs eastward through several metropolitan areas in the southern section of the state. The highway serves Benton Harbor–St. Joseph near Lake Michigan before turning inland toward Kalamazoo and Battle Creek on the west side of the peninsula. Heading farther east, I-94 passes through rural areas in the middle of the southern Lower Peninsula, crossing I-69 in the process. I-94 then runs through Jackson, Ann Arbor, and portions of Metro Detroit, connecting Michigan's largest city to its main airport. Past the east side of Detroit, the Interstate angles northeasterly through farmlands in The ThumbtoPort Huron, where the designation terminates on the Blue Water Bridge at the Canada–United States border.
The first segment of what later became I-94 within the state, the Willow Run Expressway, was built near Ypsilanti and Belleville in 1941, with an easterly extension to Detroit in 1945. This expressway was initially numbered M-112. In the mid-1950s, state and federal officials planned an Interstate to replace the original route of US Highway 12 (US 12). By 1960, the length of I-94 was completed from Detroit to New Buffalo. Two years later, the US 12 designation was dropped from the freeway. Subsequent extensions in the 1960s completed most of the rest of the route, including the remaining sections between Detroit and Port Huron which superseded the routing of US 25. The last segment opened to the public in 1972 when Indiana completed its connection across the state line. Since completion, I-94 has remained relatively unchanged; a few interchanges have been rebuilt, a second span was constructed for the Blue Water Bridge, and, in 1987, a plane crashed on the freeway during takeoff from the airport in Detroit. The routing of I-94 is notable for containing the first full freeway-to-freeway interchange in the United States, connecting to the Lodge Freeway (M-10), and for comprising the first complete border-to-border toll-free freeway in a state in the United States. The highway has one auxiliary route, I-194, which serves downtown Battle Creek, and eight business routes. Various segments have been dedicated to multiple people and places. (Full article...)
Interstate 80 (I-80) is a transcontinental Interstate Highway in the United States, stretching from San Francisco, California, to Teaneck, New Jersey. In Iowa, the highway travels west to east through the center of the state. It enters the state at the Missouri RiverinCouncil Bluffs and heads east through the southern Iowa drift plain. In the Des Moines metropolitan area, I-80 meets up with I-35 and the two routes bypass Des Moines together. On the northern side of Des Moines, the Interstates split and I-80 continues east. In eastern Iowa, it provides access to the University of IowainIowa City. Northwest of the Quad Cities in Walcott is Iowa 80, the world's largest truck stop. I-80 passes along the northern edge of Davenport and Bettendorf and leaves Iowa via the Fred Schwengel Memorial Bridge over the Mississippi River into Illinois.
Before I-80 was planned, the route between Council Bluffs and Davenport, which passed through Des Moines, was vital to the state. Two competing auto trails, the Great White Way and the River-to-River Road, sought to be the best path to connect three of the state's major population centers. The two trails combined in the 1920s and eventually became US Highway 32 (US 32) in 1926. US 6, which had taken the place of US 32, became the busiest highway in the state. In the early 1950s, plans were drawn up for the construction of an Iowa Turnpike, to be the first modern four-lane highway in the state, along the US 6 corridor. Plans for the turnpike were shelved when the Interstate Highway System was created in 1956. (Full article...)
The Chickasaw Turnpike, also designated State Highway 301 (SH-301), is a controlled-access toll road in the rural south central region of the U.S. state of Oklahoma. A two-lane freeway, it stretches for 13.3 miles (21.4 km) from north of Sulphur to just south of Ada. The Oklahoma Turnpike Authority (OTA) owns, maintains, and collects tolls on the turnpike. The first section of the Chickasaw Turnpike opened on September 1, 1991.
The Chickasaw resulted from a compromise between urban and rural legislators. Originally, it was part of a now-canceled plan to connect southern and eastern Oklahoma with a longer turnpike. It was also intended to link Ada to the Interstate system. A four-mile (6.4 km) segment of the turnpike was transferred to the Oklahoma Department of Transportation (ODOT), making it a toll-free road, in 2011. (Full article...)
The Capitol Loop was a state trunkline highway running through Lansing, Michigan, in the United States that was commissioned on October 13, 1989. It formed a loop route off Interstate 496 (I-496) through downtown near the Michigan State Capitol complex, home of the state legislature and several state departments. The Michigan Department of Transportation (MDOT) had labeled it as Capitol Loop I-496orCL I-496 on some maps, similar to the Business Loop Interstate nomenclature. However, unlike other business loops in Michigan, it had unique reassurance markers—the signs that served as regular reminders of the name and number of the highway. It was known internally at MDOT as Connector 496 for inventory purposes. The route followed a series of one-way and two-way streets through downtown Lansing, directing traffic downtown to the State Capitol and other government buildings. Unlike the other streets downtown, the seven streets comprising the Capitol Loop were under state maintenance and jurisdiction.
The loop was originally proposed in 1986 as part of a downtown revitalization effort. Almost from the beginning before the highway was commissioned in 1989, it was affected by controversial proposals. Several suggestions by community leaders to rename city streets in honor of Martin Luther King Jr. were rejected. In the end, Logan Street was given a second name, Martin Luther King Jr. Boulevard, and the original name was eventually dropped. (Full article...)
New York State Route 343 (NY 343) is a state highway located entirely within central Dutchess County, in the Hudson Valley region of the U.S. stateofNew York. It runs east–west from the intersection of NY 82 in the village of Millbrook to the town of Amenia, where it crosses the Connecticut state line and continues eastward as Route 343, a Connecticut state highway located entirely within the town of Sharon. Along the way, it has a 7.3-mile (11.7 km) concurrency with NY 22 from vicinity of the hamletofDover Plains to the hamlet of Amenia.
The entirety of modern Route 343 was originally the Dover branch of the Dutchess Turnpike. The turnpike, which was in operation from the early to the mid-19th century, was a major transportation route at the time, connecting several local communities to Litchfield County, Connecticut, and the city of Poughkeepsie. NY 343 was designated in 1930, connecting the hamlet of Amenia to the state line, but was relocated a few years later onto the portion of New York State Route 200 from South Millbrook to the hamlet of Dover Plains. The NY 200 designation was rerouted east of Millbrook on NY 343's original alignment. NY 343 absorbed NY 200 in the early 1940s, creating an overlap with NY 22 between Dover Plains and Amenia. The Connecticut portion of the highway was originally designated as part of Route 4; it was renumbered to Route 343 in 1932. (Full article...)
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K-108 was a 1.500-mile-long (2.414 km) north–south state highway in the U.S. state of Kansas. Both of K-108's termini were at U.S. Route 59 (US-59) on the west edge of Erie.
Before highways were numbered in Kansas there were auto trails. A portion of K-108 followed the former King of Trails. In 1946, a new alignment of US-59 was approved to the west of Erie, as well as K-108, which would connect Erie to the new alignment. The new alignment of US-59 and K-108 were completed in 1960. That same year, K-108 was extended east, then north, then west to US-59. This created a complete loop through Erie off US-59. K-108 was removed from the state highway system in a resolution approved in 2004. (Full article...)
State Route 117 (SR 117) is a short, 1.40-mile (2.25 km) long state highway located entirely within Port Angeles, the county seatofClallam County, in the U.S. stateofWashington. The short roadway, named the Tumwater Truck Route, serves the waterfront of Port Angeles and intersects two streets and crosses under another street on a short bridge. Beginning at an interchange with U.S. Route 101 (US 101), the highway travels northeast to terminate at Marine Drive. SR 117 was first established in 1991, but a road parallel to the current roadway had existed since 1966. (Full article...)
State Route 3 (SR 3) is a 59.81-mile-long (96.25 km) state highway in the U.S. stateofWashington, serving the Kitsap PeninsulainMason and Kitsap counties. The highway begins at U.S. Route 101 (US 101) south of Shelton and travels northeast onto the Kitsap Peninsula through BelfairtoGorst, where it intersects SR 16 and begins its freeway. SR 3 travels west of Bremerton, Silverdale and Poulsbo before it terminates at the eastern end of the Hood Canal Bridge, signed as SR 104. The highway is designated as a Strategic Highway Network (STRAHNET) corridor under the National Highway System as the main thoroughfare connecting both parts of Naval Base Kitsap and is also part of the Highways of Statewide Significance program.
SR 3 was established during the 1964 highway renumbering and codified in 1970 as the successor to Secondary State Highway 14 (SSH 14) from Shelton to Belfair, Primary State Highway 14 (PSH 14) from Belfair to Gorst, and PSH 21 from Gorst to the Hood Canal Bridge. PSH 21 was previously part of State Road 21 from 1915 to 1937, while PSH 14 was part of State Road 14 and the Navy Yard Highway from 1919 to 1937. The present SR 3 freeway was opened in 1968 in the Bremerton area and was extended north to Silverdale in 1973, to Bangor in 1981, and to Poulsbo in 1983. (Full article...)
State Highway 9, abbreviated as SH-9, OK-9, or simply Highway 9, is a major east–west highway in the U.S. state of Oklahoma. Spanning across the central part of the state, SH-9 begins at the Texas state line west of Vinson, Oklahoma, and ends at the Arkansas state line near Fort Smith, Arkansas. State Highway 9 is a major highway around the Norman area. At 348.1 miles (560.2 km), SH-9 is Oklahoma's second-longest state highway (second to State Highway 3). (Full article...)
State Route 369 (SR 369) is a short, two-lane north–south state highway in the western portion of the U.S. stateofOhio. The southern terminus of SR 369 is at an interchange with SR 4 approximately two and a half miles (4.0 km) northeast of Enon. Its northern terminus is at U.S. Route 40 (US 40) nearly one and a half miles (2.4 km) east of Donnelsville. SR 369 was created in the mid-1930s. In addition to serving as a connector between SR 4 and US 40 southwest of Springfield, it provides access to a county park named in honor of George Rogers Clark. (Full article...)
M-227 is a 6.834-mile (10.998 km) north–south state trunkline highway in the U.S. state of Michigan. It consists largely of a segment of old U.S. Highway 27 (US 27) along the south and west sides of Marshall. The highway passes the airport and serves an industrial section of town north of the Kalamazoo River. M-227 was created as a part of a program to add additional routes into the state's highway system under the leadership of Governor John Engler. (Full article...)
State Route 195 (SR 195) was a state highway in the U.S. stateofCalifornia, branching westward from SR 111toSR 86 near the town of Mecca and the Salton Sea. The route formerly extended east to Interstate 10 (I-10) near Joshua Tree National Park as a longer route extending to Blythe and points further east. After the main route was shifted north, the older route remained as an alternate known as Box Canyon Road. The route was designated in the 1964 state highway renumbering, although the Box Canyon Road portion was removed as a state highway in 1972. Following the construction of the SR 86 expressway, SR 195 was curtailed in 2009, and removed entirely in 2014. (Full article...)
New York State Route 345 (NY 345) is a state highway located entirely within St. Lawrence County in the North CountryofNew York in the United States. It is a north–south route connecting the towns of Waddington and Potsdam by way of the town of Madrid. The southern terminus of NY 345 is at an intersection with U.S. Route 11 (US 11) in the village of Potsdam. Its northern terminus is at a junction with NY 37 in the village of Waddington by the St. Lawrence River.
NY 345 was assigned as part of the 1930 renumbering of state highways in New York; however, it originally followed a different alignment south of the hamlet of Madrid. At the time, what is now NY 345 between Madrid and Potsdam was part of NY 56A. The NY 56A designation was eliminated in 1980. NY 345 was realigned two years later to follow old NY 56A to Potsdam as a result of a highway maintenance swap between the state of New York and St. Lawrence County. Ownership and maintenance of NY 345's original routing south of Madrid was transferred from the state to the county and the village of Canton as part of the exchange. (Full article...)
C-66 is a county-designated highway in the US state of Michigan running about 28 miles (45 km) across the northern tip of the Lower Peninsula. The roadway starts in the unincorporated communityofCross VillageinEmmet County at an intersection with M-119 and C-77. It follows Levering Road through rural areas to an interchange with Interstate 75 (I-75) west of Cheboygan. The eastern terminus is at an intersection with US Highway 23 (US 23) and M-27 in downtown Cheboygan. The first roadways along what is now C-66 were in place by the early 20th century. Segments were paved by 1936, although some reverted to a gravel surface during World War II. The full roadway was paved by the mid-1950s, and the C-66 moniker was designated on the roadway in the early 1970s. (Full article...)
M-37 is a north–south state trunkline highway in the US state of Michigan. The southern terminus is near the border between Kalamazoo and Calhoun counties at exit 92 of Interstate 94 (I-94) southwest of Battle Creek. The northern terminus is at the Mission Point LightonOld Mission PointinGrand Traverse County. In between, the highway connects Battle Creek, Grand Rapids and Traverse City. Motorists will travel through agricultural land, forests, suburbs and large cities along the way. The section of M-37 on the Old Mission Peninsula was designated what is now a Pure Michigan Scenic Byway in 2008.
Originally named the Muskegon, Grand Traverse and Northport State Road, and later the Newaygo and Northport State Road, today's modern highway can be traced back to the 19th century and earlier. The southernmost section between Grand Rapids and Battle Creek parallels an early Indian trail. The modern highway was formed by July 1, 1919 along this segment. By the 1940s, a second section of highway was designated M-37, creating a gap between it and the original section. This gap was eliminated in the 1950s, completing the M-37 corridor in the state. Additional changes to the routing were made through the Grand Rapids area into the 1970s. (Full article...)
Delaware Route 1A (DE 1A) is a state highwayinSussex County, Delaware. The route, which is signed north-south, runs 2.01 mi (3.23 km) from DE 1 in the town of Dewey Beach north to another intersection with DE 1 west of the city of Rehoboth Beach. The route provides access to Rehoboth Beach from DE 1, heading north before turning to the west. DE 1A follows King Charles Avenue, Bayard Avenue, 2nd Street (southbound), Christian Street (northbound), and Rehoboth Avenue.
What is now DE 1A was originally a part of DE 14 between 1936 and 1942. The road was designated DE 14A by 1966. In the 1970s, DE 1A was designated along DE 14A for a few years before DE 14A was decommissioned in favor of DE 1A. Between 2002 and 2006, a streetscape project revitalized the Rehoboth Avenue portion of the route and a roundabout was added at the northern entrance to Rehoboth Beach. (Full article...)
U.S. Route 1 Business (US 1 Bus.) is a four-lane surface road that provides an alternate route to the Trenton Freeway (US 1) northeast of TrentoninMercer County, New Jersey. The route is 2.73 miles (4.39 km) long and runs between US 1 in Trenton and Lawrence Township. On the border of Trenton and Lawrence Township, US 1 Bus. intersects the northbound direction of US 206 at the Brunswick Circle. The route was once part of a longer U.S. Route 1 Alternate (US 1 Alt.), which continued southwest through downtown Trenton and into Morrisville, Pennsylvania.
The old US 1 Alt. in Trenton is now signed by the New Jersey Department of Transportation as part of US 1 Bus., despite not being officially recognized as such. Signage in Pennsylvania no longer exists; most of the former US 1 Alt. is now part of Pennsylvania Route 32 (PA 32). US 1 Alt. was created in 1953 after US 1 was moved to a freeway between Morrisville and the Brunswick Circle. By the 1980s, when the Trenton Freeway was extended to its current terminus, US 1 Bus. was created onto its current alignment and US 1 Alt. was removed through Trenton and Morrisville. (Full article...)
New York State Route 250 (NY 250) is a north–south state highway in the eastern portion of Monroe County, New York, in the United States. It extends for just over 16 miles (26 km) from an intersection with NY 96 in the town of Perinton to a junction with Lake Road (former NY 18) near the Lake Ontario shoreline in the town of Webster. NY 250 passes through the villages of Fairport and Webster, where it meets NY 31F and NY 104, respectively. The highway is the easternmost north–south state route in Monroe County.
Most of the highway was taken over by the state of New York in the 1910s and 1920s. In 1908, the section of modern NY 250 in Fairport between Church and High Streets became part of Route 20, an unsigned legislative route assigned by the New York State Legislature. The definition of the route was altered in 1921, taking the route on a more southerly course that used the portion of what is now NY 250 between NY 31 and NY 31F instead through eastern Monroe County. NY 250 was assigned to its current alignment as part of the 1930 renumbering of state highways in New York. (Full article...)
State Route 397 (SR 397), also known as Mack Hatcher Memorial Parkway, is a primary state route that serves as a perimeter road for the city of Franklin, Tennessee. Throughout its length, SR 397 also carries the designations of U.S. Route 31 Truck (US 31 Truck) and U.S. Route 431 Truck (US 431 Truck). The route connects multiple U.S. and state routes, and serves as a bypass around the business district of Franklin, as well as a major thoroughfare.
A route to bypass Franklin was first proposed in 1963, although major work did not begin until the late 1970s. The eastern part of SR 396 was constructed in three phases between 1983 and 1989. Since Franklin has grown rapidly since the road's initial construction, it is planned to be extended to form a full circumferential loop. The first phase of the extension was completed in 2021, with the final phase planned to complete the loop. The entire route is also planned to be eventually widened to four lanes. (Full article...)
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