A view of the northern end of the concurrency between US5 Alt. and US2 west of downtown St. Johnsbury
U.S. Route5 Alternate (US5 Alt.) in St. Johnsbury, Vermont, runs parallel to US5. US5 goes through the downtown area, while US5 Alt. goes around the west side of the city. The road has three names: Main Street, Mt. Pleasant Street, and Hastings Street. The route, known as Main Street at this point, starts from its southern terminus at its junction with US5, just north of US5's interchange with I-91 (exit20). The road goes up a winding hill before meeting US2. Between its junctions with US5 and US2, US5 Alt. is concurrent with US2 Truck. US2 goes west on Western Avenue, while US5 Alt. continues north, concurrent with US2. At the next intersection, US2 turns east onto Eastern Avenue and US5 Alt. continues on Main Street as the road turns slightly right. At Arnold Park, Main Street keeps right, while US5 Alt. turns left onto Mt. Pleasant Street. After that, Mt. Pleasant Street keeps straight while US5 Alt. veers right onto Hastings Street. The road keeps straight until its northern terminus at US5 north of St. Johnsbury.
U.S. Route5 Alternate (US5 Alt.) in Newport, Vermont, runs parallel to US5. US5 goes through the downtown area, while US5 Alt. goes around the southeast side of the city. The road that US5 Alt. is on only carries the name of Coventry Street. This route starts from its southern terminus at its junction with US5, near the edge of the city limits. The road goes northeast and meets with the South Bay on the east side. US5 Alt. continues straight after intersecting with 2nd Street. Before the next intersection, US5 turns northwest still as Coventry Street entering the Newport urban area. The road keeps straight until its northern terminus at US5 in downtown Newport.
U.S. Route5 Alternate (US5 Alt.) in Derby Line, Vermont, is an alternate way to reach Canada from US5. The road that US5 Alt. is on only carries the name of Caswell Avenue. This route starts from its southern terminus at its junction with US5 in downtown Derby Line. This road then travels east to Interstate91 (I-91). At I-91, US5 Alt. merges with the I-91 northbound continuing until its northern terminus at the Canada–United States border. The road continues north as Autoroute55 in Quebec, Canada.
Traffic Research Unit (May 2013). "2012 (Route Log) AADTs for State Highways"(PDF). Policy, Planning and Intermodal Development Division, Vermont Agency of Transportation. Retrieved March 8, 2015.