State Route 51 (SR 51) is a northwest-southeast highway (signed north-south) in northwest Ohio. Its southern terminus is at U.S. Route 20 just south of Elmore, Ohio, and its northern terminus is at its interchange, along with State Route 184, at U.S. Route 23 in Sylvania, Ohio. Before an ODOT signage project in 2010, the northern (western) portion of the route, from its northern (western) terminus to the Maumee River was signed as an east-west route. The portion from the Maumee to its southern (eastern) terminus was signed north-south. ODOT has now signed all portions as north-south.
From its southern terminus, State Route 51 heads north to an interchange with the Ohio Turnpike before it enters Elmore. After exiting Elmore, the route heads northwest through the village of Genoa and near the town of Millbury before entering Northwood. The route from here to the Maumee River is also known as Woodville Road.
The route interchanges with Interstate 280 before entering southwest Oregon and into Toledo. After it crosses the Maumee, it eventually moves onto Monroe Street, which moves in a generally northwesternly direction until it reaches U.S. Route 23 in Sylvania, where it ends. SR 184 and US 223 end here as well.
State Route 49 (SR 49) is a state highway in the western part of the U.S. state of Ohio. It begins in Drexel, an area within the city of Trotwood, at US 35 and runs northwesterly to Greenville, and then runs roughly along near the western edge of the state near the Indiana state line to the Michigan state line where it meets with Michigan's M-49.
SR 49's southern terminus is west of Dayton, at the intersection of U.S. Route 35 and West Third Street in Drexel. Both Drexel (a census-designated place) and the intersection straddle the border between Trotwood and Montgomery County's Jefferson Township. The roadway carrying SR 49 continues southward (signed "east") from this intersection as US 35 (designated "C. J. McLin Jr. Parkway"), a limited-access expressway into downtown Dayton. (Westbound US 35 proceeds along West Third Street)
SR 49 continues north from US 35 through Trotwood along a roadway locally called the "Northwest Connector" or the "Trotwood Connector", then turns onto Salem Avenue, which crosses into Clayton. The route then briefly travels through Englewood, straddles the Englewood-Clayton line, again crosses into Clayton, then the ramps to and from Interstate 70 cross into Englewood and back into Clayton. SR 49 is then concurrent with I-70 for approximately 1.5 miles (2.4 km) through Clayton. SR 49 then exits from I-70 at ramps passing from Clayton into Clay Township, Montgomery County. The route then continues north to Greenville, Fort Recovery, Willshire, Convoy, Payne, Antwerp, Hicksville, Edgerton and Edon. SR 49 then interchanges with the Ohio Turnpike at that highway's first interchange east of the Indiana-Ohio state line. SR 49 terminates at the Ohio-Michigan state line where it continues north as Michigan State Highway 49.
The following highways are numbered 51:
South Carolina Highway 51 (SC 51) is a primary state highway in the U.S. state of South Carolina. It is unique for being signed in two different locations in the state; the first section from Georgetown to Florence, the second section in Fort Mill.
The first SC 51 begins at US 701 near Georgetown, goes northwest and ends at US 76 in Florence and concurrency with SC 41. Majority of the route is a two-lane rural road, except through Hemingway, Johnsonville, and Florence, where it has four lanes.
The second SC 51 is a short 1-mile-long (1.6 km) road that starts at US 21 and ends at the North Carolina state line, continuing on as NC 51 through Pineville. The route is only 2-lane, expanding to 4-lane at the state line.
Established as a new routing in either 1925 or 1926; the original route ran from SC 40 (today as US 701) along Choppee Road to Hemmingway then onto Florence, ending at SC 41 (current US 52-301). The route was fully paved by 1939. In the early 1960s, the SC 51 was rerouted as a concurrency with SC 41 from Hemmingway to Rhems, then to US 701 near Georgetown. In 1978, SC 51 was extended in Florence to US 76.
U.S. Route 322 (US 322) is a U.S. highway running from Cleveland, Ohio east to Atlantic City, New Jersey. The easternmost segment of the route in New Jersey runs 62.64 miles (100.81 km) from the Commodore Barry Bridge over the Delaware River in Logan Township, Gloucester County, where it continues southeast to Atlantic Avenue and Pacific Avenue in Atlantic City, Atlantic County. The portion of the route between the Commodore Barry Bridge and Route 42 is mostly a two-lane undivided road that is concurrently signed with County Route 536, passing through Mullica Hill and Glassboro. From Williamstown, US 322 follows the Black Horse Pike, a four-lane road, southeast to Atlantic City. In Hamilton Township, Atlantic County, US 322 forms a concurrency with U.S. Route 40, continuing with that route all the way to Atlantic City. US 322 intersects several major roads including U.S. Route 130 and Interstate 295 in Logan Township, the New Jersey Turnpike in Woolwich Township, Route 55 in Harrison Township, Route 42 in Williamstown, Route 50 and U.S. Route 40 in Hamilton Township, the Garden State Parkway in Egg Harbor Township, and U.S. Route 9 in Pleasantville.
This is a list of former state routes in Ohio since 1923 with route numbers from 569 through 673 inclusive. For a full list of former state highways in Ohio, see the list of state routes in Ohio.
SR 569 was a state route in Williams County connecting US 127 in Jefferson Township to US 20 in Madison Township. In the community of Kunkle, SR 569 intersected a now-defunct segment of SR 246. The route existed from 1938 until 1955 when the entire road became a part of Williams County Road 13.
SR 570 was a state-maintained section of Neowash Road in southern Lucas County. The four-mile-long (6.4 km) route connected SR 295 in Providence Township and US 24 southwest of Waterville. The route existed from 1937 until 1961. Today, Neowash Road is signed as Lucas County Road 143.
SR 571 was a former state route in Bridgewater Township, Williams County connecting US 20 and the Michigan state line. The four-mile-long (6.4 km) route existed from 1937 until 1955. The road itself is still a state highway as SR 576 was signed on the entire route after being extended from Montpelier.
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.