Wyoming Highway 257

Wyoming Highway 257 marker
Wyoming Highway 257
Casper West Belt
Map
WYO 257 highlighted in red
Route information
Maintained by WYDOT
Length7.302 mi[1] (11.751 km)
Existed2012–present
HistoryCompleted in 2015
Major junctions
South end WYO 220 near Red Butte
North end

US 20 / US 26 / US 20 Bus. / US 26 Bus. near Mills
Location
CountryUnited States
StateWyoming
CountiesNatrona
Highway system
  • Wyoming State Highway System
WYO 256 WYO 258

Wyoming Highway 257 (WYO 257), also known as the Casper West Belt, is a state highway in Natrona County, Wyoming. The 7.3-mile (11.7 km) highway forms part of a bypass around Casper and Mills, connecting WYO 220 in the south to U.S. Route 20 (US 20) and US 26 in the north. The road itself continues east on an expressway carrying US 20 and US 26 to a junction with Interstate 25 (I-25).

The highway was proposed in the late 1990s to relieve truck congestion in Casper and Mills, particularly on WYO 220, and approved in 2002. The project used federal funding and began construction in 2013 after a series of eminent domain disputes delayed planning. WYO 257 opened to traffic on December 31, 2015.

  1. ^ State Maintenance Engineer's Office (October 1, 2017). "2017 Maintenance Section Reference Book" (PDF). Wyoming Department of Transportation. p. 119. Retrieved September 10, 2021.