Several special routes of U.S. Route 1 (US 1) exist, from Florida to Maine. In order from south to north, separated by type, these special routes are as follows. __TOC__
Alternate routes
Jacksonville alternate route
U.S. Highway 1 Alternate (US 1 Alt.) is an alternate U.S. Highway in Jacksonville, Florida. It bypasses downtown to the east via the Hart Bridge, running mostly on freeways.
Like all American Association of State Highway and Transportation Officials (AASHTO)-designated highways in Florida, US 1 Alt. always carries a Florida Department of Transportation (FDOT)-designated state road number, be it signed or unsigned: State Road 126 (SR 126) from Philips Highway (US 1/SR 5) to the south end of the Hart Expressway SR 228A from the end of the Hart Expressway to the junction with the Commodore Point Expressway (SR 228 east) SR 228 from the north end of the Hart Expressway to the Downtown Jacksonville exit (SR 228 west) via the Hart Bridge SR 115A from the Downtown Jacksonville exit to the junction with the Martin Luther King Jr. Parkway (SR 115 south) SR 115 from the junction with the Martin Luther King Jr. Parkway to the route's northern terminus at US 1/US 17 (SR 5/SR 15/SR 115 north)
Major intersections
Washington alternate route
U.S. Route 1 Alternate (US 1 Alt.) is an alternate route forming a loop off US 1 between Washington, D.C. and Hyattsville, Maryland.
Route description In DC, US 1 Alt. splits from US 1 at the intersection of Constitution Avenue NW and 6th Street NW. US 1 goes up 6th Street NW on its way to the intersection of Rhode Island Avenue NW. US 1 Alt. stays on Constitution Avenue NW/NE as it traverses Capitol Hill, then follows Maryland Avenue NE, going around Stanton Park, to the Starburst Intersection comprising Maryland Avenue, Florida Avenue, H Street, Bladensburg Road, 15th Street NE, and the DC Streetcar line. US 1 Alt. then follows Bladensburg Road Northeast, which takes it into Prince George's County, Maryland, after an at-grade intersection with New York Avenue NE (US 50) and after passing under Amtrak's Northeast Corridor. After passing through Colmar Manor and Cottage City, the road enters Bladensburg and turns onto Baltimore Avenue toward Hyattsville, where it rejoins US 1 at Rhode Island Avenue.
US 1 Alt. crosses Eastern Avenue NE and enters the state of Maryland from DC in Prince George's County. The route heads northeast along the partially four-lane divided Bladensburg Road passing industrial areas and warehouses on the northwest and the Fort Lincoln Funeral Home and Cemetery on the southeast straddling the southeastern boundary of the town of Cottage City. US 1 Alt. crosses over Dueling Creek adjacent to Bladensburg Dueling Grounds on the southeast before heading into a commercial area where the route begins to follow the northwestern boundary of the town of Colmar Manor. In this area, the route insects the southern terminus of Maryland Route 208 (MD 208; 38th Street), before continuing along the town line and passing through a mix of residential and commercial areas. US 1 Alt. leaves the boundary between Colmar Manor and Cottage City as it crosses over the Anacostia River just to the southeast of the confluence between its Northeast and Northwest branches and enters the town of Bladensburg. Immediately after crossing the river, the route's median for its directional Y intersection with the eastern terminus of MD 450 (Annapolis Road), which is the old alignment of US 50 in the capital region of Maryland which heads east into downtown Bladensburg. In the middle of the intersection is a Maryland memorial for World War I soldiers known as the Peace Cross.
Past MD 450, US 1 Alt. curves north and its name changes to Baltimore Avenue passing industrial areas on the east and the Old Port of Bladensburg Community Park on the west. The route leaves Bladensburg at its crossing over the Northeast Branch and enters the city of Hyattsville. The route narrows to a two-lane undivided road and continues through a mix of residential, commercial, and industrial areas. US 1 Alt. reaches an at-grade railroad crossing with a component of the Y junction between CSX Transportation's Capital Subdivision line and its Alexandria Extension. A short distance past the crossing, the route enters a long bridge with a sweeping curve that crosses over the Capital Subdivision before the route reaches its northern terminus at US 1 (Baltimore Avenue) in downtown Hyattsville. Baltimore Avenue turns northward on US 1, taking over that route name from US 1 Alt. through the northern suburbs of Prince George's County including Riverdale Park, University Park, College Park, Beltsville, and Laurel.
History In the 1940s, this route was known as U.S. Route 1 Bypass (US 1 Byp.) and was cosigned with U.S. Route 50 Alternate (US 50 Alt.) and MD 411. In the 1960s, this route went from 14th Street & D Street S.W. up to Independence Ave. where it would be co-signed with U.S. Route 50 as it went up Maryland Ave., 3rd St., and New York Ave. It then started following a portion of the current route at New York Ave. & Bladensburg Rd. until it met back up with U.S. 1.Rand McNally and Company. Mobil Travel Map of Washington D.C. 1967.
Major intersections
Baltimore alternate route
U.S. Route 1 Alternate (US 1 Alt.) is a alternate route forming a loop off US 1 between Arbutus and Baltimore, Maryland. US 1 Alt. serves the southwestern Baltimore County community of Halethorpe and connects US 1 with full-access interchanges with Interstate 95 (I-95) and I-695.
Business routes St. Augustine business loop
U.S. Highway 1 Business (US 1 Bus.) in St. Augustine, Florida, is a business route of US 1. From its southern terminus at US 1 to the intersection with SR 16, it carries the hidden FDOT designation of State Road 5A (SR 5A). The segment from SR 16 to the northern terminus at US 1 is maintained by the City of St. Augustine and is the only AASHTO-defined road in Florida that is not under state maintenance.
US 1 Bus. begins at the intersection of US 1 and King Street (County Road 214, or CR 214). US 1 Bus. travels east on King Street, with a short water crossing of the San Sebastian River two blocks east of US 1. The route continues, passing the southern end of Flagler College and then becoming a one-way pair for four blocks, with King Street taking eastbound traffic and Cathedral Place, one block north, taking westbound traffic. At the intersection with SR A1A just west of the Bridge of Lions toward Anastasia Island, US 1 Bus. heads north as a two-way road, starting a concurrency with SR A1A, now known as North Ocean Boulevard, going through the heart of St. Augustine. US 1 Bus. and SR A1A run along the west shore of the Matanzas River then curves to the northwest in front of the Castillo de San Marcos. At West Castillo Drive, the name changes to San Marco Avenue. At May Street, SR A1A heads east, splitting off from US 1 Bus. A bit further north, it intersects with the eastern terminus of SR 16 at Picolata Road. Six blocks to the north, US 1 Bus. terminates at US 1.
Major intersections
Waycross business loop
U.S. Highway 1 Business (US 1 Bus.) is a business route of US 1 partially in the city limits of Waycross, Georgia. It is concurrent with US 23 Bus. and State Route 4 Bus. (SR 4 Bus.) for its entire length.
US 1 Bus./US 23 Bus./SR 4 Bus. begins at an intersection with US 1/US 23/SR 4 (known as Memorial Drive south of this intersection and South Georgia Parkway west of it) and US 82/SR 520 (also known as South Georgia Parkway). The business routes travel northwest on Memorial Drive. The green traffic island on the north-northeast of the intersection is named the Millie DeShazo Triangle. They extend into the heart of Waycross, while the mainline route of US 1/US 23/SR 4 heads west across the southern portion of the city. They immediately curve to the west-northwest and begin paralleling CSX Transportation's Brunswick Subdivision. Just past Harrison Street, they pass Memorial Stadium. On a curve to a nearly due west direction, they leave the CSX Transportation tracks and cross over the city drainage canal. They curve to the northwest and travel under a railroad bridge for CSX Transportation's Jesup Subdivision. Immediately after this bridge is an intersection with US 84/SR 38 (Plant Avenue) and the eastern terminus of Carswell Avenue. The business routes turn to the right and travel northeast on a concurrency with US 84/SR 38 for approximately . The five highways immediately begin paralleling the Jesup Subdivision and pass an office of the Georgia Department of Labor. US 1 Bus./US 23 Bus./SR 4 Bus. then turns left onto State Street, also signed as Ossie Davis Parkway, and travel to the northwest. They curve to the north-northwest and pass Wacona Elementary School. An intersection with Tebeau Street leads to a Mayo Clinic hospital. The three highways curve to the north-northwest. Between Charlton and Clough streets, the southbound lanes meet the northern terminus of Johnson Avenue, a one-way street, at a partial interchange. Just north of Abner Street, they begin paralleling another CSX Transportation rail line, specifically the Fitzgerald Subdivision. They cross over Kettle Creek, where they leave the city limits of Waycross. They curve to the west-northwest and leave the rail line. An intersection with the northern terminus of Airport road leads to the Erin Johnson Softball Complex, Ware State Prison, St. Illa Substance Abuse Center, the Ware County Sheriff's Office, and the Southland Waste Transfer Station. This intersection is just north of Waycross–Ware County Airport. They continue in a northwesterly direction and then reach their northern terminus, a second intersection with the US 1/US 23/SR 4 mainline. Except for the far northern end, the entire length of US 1 Bus. is part of the National Highway System, a system of routes determined to be the most important for the nation's economy, mobility, and defense.
US 1 Bus./SR 4 Bus. was established in 1996, replacing the old mainline US 1/SR 4 through Waycross, via Memorial Drive, Plant Avenue, State Street, and Alma Highway.
Major intersections
Swainsboro business loop
U.S. Highway 1 Business (US 1 Bus.) is a business route of US 1 that is partially within the city limits of Swainsboro, Georgia. It is concurrent with SR 4 Bus. for its entire length.