State Route 380 (SR 380) is a north–south state highway in the southwestern quadrant of the U.S. state of Ohio. The southern terminus of SR 380 is at its junction with the concurrency of U.S. Route 22 (US 22) and SR 3 nearly 3 miles (4.8 km) northeast of Clarksville. Its northern terminus is in downtown Xenia, following a brief concurrency with US 68, at the signalized intersection where the U.S. route meets US 42.
Along its way, SR 380 travels through the northwestern part of Clinton County and the southwestern quadrant of Greene County. No segment of SR 380 is included within the National Highway System (NHS). The NHS is a network of highways deemed most important for the economy, mobility and defense of the country.
SR 380 was assigned in 1935. Initially, it served as a spur route that ran along its present alignment from its current northern terminus in downtown Xenia southwest to the former northwestern Clinton County village of New Burlington. Three years after is designation, SR 380 was extended to the southeast from New Burlington along a previously un-numbered roadway to its present southern terminus at the US 22/SR 3 concurrency near Clarksville.
Route 380 or Highway 380 may refer to:
Interstate 380 (I-380) is a short 1.7-mile (2.7 km) east–west spur Interstate Highway in the San Francisco Bay Area of Northern California, connecting Interstate 280 in San Bruno to U.S. Route 101 near the San Francisco International Airport (SFO). The highway primarily consists of only three intersections: I-280, El Camino Real (State Route 82), and U.S. 101. Like nearby I-280, I-380 never connects to Interstate 80, its parent Interstate Highway. However, there is no rule that says that spur routes need to. (Similarly, the spur route Interstate 795 branches off from Interstate 695, a beltway around Baltimore, and is only indirectly linked to Interstate 95.)
I-380 is officially known as the Quentin L. Kopp Freeway, named after the prominent Calif. State Senator from San Mateo County. This highway was previously named the Portola Freeway to honor the eighteenth-century Spanish explorer Gaspar de Portolá, whose expedition in 1769-70 discovered the San Francisco Bay, from a viewpoint on the Sweeney Ridge located between San Bruno and Pacifica.
Below is a list and summary of the unconstructed state highways in the U.S. state of Arizona. Some are currently proposed while the others have been since cancelled prior to being constructed.
State Route 30 (formerly State Route 801), also known as the I-10 Reliever, is a planned state highway in the southwest parts of Phoenix, Arizona and nearby suburbs. It will connect the southern terminus of Loop 303 with the South Mountain leg of Loop 202. It is planned as a controlled-access freeway to relieve heavy traffic congestion experienced along Interstate 10 in the area.
State Route 50, also known as the Paradise Parkway, was a proposed urban freeway in Phoenix and Glendale. Originally proposed in the 1980s, the freeway would have run east to west, connecting State Route 51 and Loop 101, roughly parallel to and 4 miles (6.4 km) north of I-10, in the vicinity of Camelback Rd. As the proposed freeway would have crossed through largely developed land and densely populated neighborhoods, it proved to be both extremely expensive and highly unpopular. The route was eventually struck from state planning maps and all land acquired for right-of-way was subsequently sold, the funds being used to pay for other transportation projects.
State Route 72 (SR 72) is a north–south state highway in the U.S. state of Ohio. Its southern terminus is at US 62 near Highland, and its northern terminus is at SR 334 just north of Springfield. As it travels through Springfield, Ohio, it is known as Limestone Street.
Prior to receiving the designation of SR 72, the route of what is now SR 72 was included within the state highway system in 1915 along various routes. The Penn Township–Springfield routes were unified as SR 72 in 1923 routed mostly along the same roads it runs today. The only major change that occurred to the highway's routing happened around 1972 when US 68 was routed out of Springfield on a freeway west of the city. SR 72 was extended north along the former US 68 to end north of the city. The interchange that currently serves as SR 334's western terminus was SR 72's northern terminus at first but was truncated to its current terminus by 2003.
State Route 252 (SR 252) is a 23.04-mile (37.08 km) long north–south state highway in the northern portion of the U.S. state of Ohio. The southern terminus of this state route is at a signalized intersection that marks the western split of the concurrency of SR 18 and SR 57 nearly 1.25 miles (2.01 km) northwest of the city limits of Medina. SR 252 has its northern terminus at a T-intersection with U.S. Route 6 (US 6) in the western Cleveland suburb of Bay Village.
Along its path, SR 252 travels through northern Medina County, the extreme eastern portion of Lorain County and the westernmost part of Cuyahoga County. There are no stretches of SR 252 that are included as a part of the National Highway System (NHS). The NHS is a network of highways that are identified to be most important for the economy, mobility and defense of the country.
SR 252 was assigned in 1925. It was originally along its current alignment from its southern terminus at SR 18 and SR 57 northwest of Medina to its junction with SR 82, at the time known as SR 81, west of Strongsville. One year later, the highway was extended north to its current northern terminus.
State Route 850 (SR 850) is a north–south state highway in southeastern Ohio, a U.S. state. Its southern terminus is at SR 588 in the hamlet of Rodney, which is west of Gallipolis. SR 850's northern terminus is at SR 554 in Bidwell. The route has an interchange with U.S. Route 35 (US 35), but otherwise intersects with no other numbered routes.
All of SR 850 runs within Gallia County. The route is not inclusive within the National Highway System.
SR 850 was created in 1995 along its current routing between SR 588 and SR 554, designated in approximately the same timeframe that the US 35 freeway was completed east of Rio Grande. No significant changes have taken place to the highway's routing since its designation.
The entire route is in Gallia County.