U.S. Highway 77 Alternate is a north–south auxiliary route of US 77, located entirely within the state of Texas. The route was commissioned in 1953, when US 77 was rerouted in southeast Texas.
US 77 Alt. running concurrently with US 90 Alt. west of Hallettsville
In road transportation in the United States, a special route is a road in a numbered highway system that diverts a specific segment of related traffic away from another road. They are featured in many highway systems; most are found in the Interstate Highway System, U.S. highway system, and several state highway systems. Each type of special route possesses generally defined characteristics and has a defined relationship with its parent route. Typically, special routes share a route number with a dominant route, often referred as the "parent" or "mainline", and are given either a descriptor which may be used either before or after the route name, such as Alternate or Business, or a letter suffix that is attached to the route number. For example, an alternate route of U.S. Route 1 may be called "Alternate U.S. Route 1", "U.S. Route 1 Alternate", or "U.S. Route 1A". Occasionally, a special route will have both a descriptor and a suffix, such as U.S. Route 1A Business.
Truck Business US 17 ends at its parent in Elizabeth City, North Carolina
Business SH-9 in Hobart, Oklahoma ends at its parent route. The center SH-9 shield is topped with a typical "BUSINESS" plate.
U.S. Route 58 Alternate serves as an alternate alignment to U.S. Route 58 in the western part of Virginia
Sign for Scenic US 412 in Kansas, OK, concurrent with US 59