Idaho Transportation Department Logo Idaho Transportation Department   Highway Info
Winter Road Conditions
US 20 Whole Road 10 reports
Parma to Boise 3 reports
Mountain Home to Arco 2 reports
Arco to Idaho Falls 2 reports
Idaho Falls to Montana 4 reports
Reports on US 20
Map of Reports on US 20 Between US 95 (near Parma) and I-84 (near Caldwell). Expect dry pavements. Weather conditions clear. Between I-84 (Caldwell) and I-184 (Boise). Expect dry pavements. Weather conditions clear. Between Avenue A and University Drive (near Boise). The road is closed to traffic due to bridge construction work. A detour is in operation. Until October 1. Between I-84; ID 51 (Mountain Home) and Cat Creek Summit (26 miles west of the Fairfield area). Expect dry pavements. Cloudy skies. Look out for large animals on the roadway. Look out for drifting snow on the roadway. Between Cat Creek Summit (26 miles west of the Fairfield area) and Van Buren Boulevard (13 miles east of the Butte City area). Expect dry pavements. Cloudy skies. Between Van Buren Boulevard (13 miles east of the Butte City area) and I-15; US 91 (Idaho Falls). Expect dry pavements. Be ready for patchy fog. Be ready for dense fog. Between I-15 (Idaho Falls) and Burton Road (2 miles west of the Rexburg area). Expect dry pavements. Cloudy skies. Be ready for dense fog. Visibility is reduced. Between 4300 West Road (2 miles west of the Rexburg area) and The South Ashton City Limits (6 miles west of the Ashton area). Expect dry pavements. Be ready for dense fog. Between The South Ashton City Limits (6 miles west of the Ashton area) and Harriman State Park (2 miles west of the Island Park area). Expect dry pavements. Cloudy skies. Between Harriman State Park (2 miles west of the Island Park area) and The Montana State Line (3 miles east of the Island Park area). The road is wet. Cloudy skies. Be ready for patchy fog.
US 20: Road closed to traffic, due to bridge construction work, detour in operation.
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