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Mountain Passes—Statewide
Map of Statewide Between Exit 346: Bridge Street and US Route 20 Business; 2600 East Road (1 mile east of the St. Anthony area). The intersecting road is closed because the bridge is closed. A detour is in operation. Until October 1. Between Exit 54: US 20; Broadway Avenue and Exit 60: The Isaacs Canyon Interchange (near Boise). Road construction work is in progress. Bridge construction work is in progress. There is work on the shoulder. People are working in the median. The roadway is reduced to one lane. Speed restrictions are in force. There is a width limit in effect. A detour is in operation. Speed limit 55 MPH. Width limit 12'0". Until October 1, 2015. Between Exit 52: Orchard Street and Exit 57: Gowen Road (near Boise). Road construction work is in progress. Bridge construction work is in progress. The roadway is reduced to one lane. Speed restrictions are in force. Speed limit 55 MPH. From 8:00PM MDT to 5:00AM MDT daily. Until December 1, 2015. Between Exit 29: US 20; Franklin Road and Exit 38: I-84B (near Nampa). Road construction work is in progress. Bridge construction work is in progress. The roadway is reduced to one lane. Speed limit 55 MPH. Until October 3. Between Banks Valley Road and Pegram Road (6 to 11 miles east of the Montpelier area). The roadway is reduced to one lane. Road construction work is in progress. The road is being repaved. Expect delays. Look out for flaggers. Consider using an alternate route. Speed restrictions are in force. There is a width limit in effect. Truck restrictions are in force. If weather permits. Speed limit 55 MPH. Width limit 12'0". Expect 15 - minute delays. Until September 30. Between Bunco Road - Brunner Road (near Athol) and Old House Road (2 miles north of the Athol area). Major road construction work is in progress. The roadway is reduced to one lane because of a new road layout. Expect changing traffic patterns. On bridges. Reduce your speed. Look out for flaggers. Until September 30. Between Exit 52: The Arbon Valley Highway and Exit 58: US 30 (near Arbon Valley). The intersecting road is closed. The bridge is closed. The roadway is reduced to one lane. A lane is closed intermittently. Bridge maintenance work is in progress. A detour is in operation. Follow the detour signs. Speed restrictions are in force. Reduce your speed. There is a width limit in effect. Construction traffic may be merging. Drive with extreme caution. Speed limit 65 MPH. Width limit 14'0". From 7:00AM MDT to 3:00AM MDT daily. Until November 1. Between Bear Creek Road and Big Elk Creek Road (2 to 6 miles east of the Irwin area). Look out for traffic congestion. Until October 4. Between Robinson Bar Road (14 miles north of the Stanley area) and Slate Creek Road (15 miles south of the Clayton area). Major road construction work is in progress. The road is closed intermittently. The roadway is reduced to one lane. Expect delays. Look out for temporary traffic lights. Look out for flaggers. There is a width limit in effect. Expect 15 - minute delays. Width limit 12'0". From 7:00AM MDT to 7:00PM MDT on weekdays. Until October 31. Between Pine Creek Bench Road and Mike Spencer Canyon Road (3 miles east of the Swan Valley area). Bridge maintenance work is in progress. Expect delays. Expect single line traffic alternating directions. Width limit 12'0". Until October 17. Between I-84 and US 20 (Boise). Traffic is slow. Between ID 55 and Exit 50: Overland Road (near Boise). Traffic is stop and go. Between Lodgepole Drive and Targee Pass (3 miles east of the Island Park area). Look out for mobile maintenance operations. Look out for a slow moving maintenance vehicle. Until today at about 5:00PM MDT. Between The Oregon State Line (near Fruitland) and Exit 17: Sand Hollow (12 miles west of the Caldwell exit). Road construction work is in progress. There is work on the shoulder. The roadway is reduced to one lane. Speed restrictions are in force. There is a width limit in effect. Speed limit 65 MPH. Width limit 14'0". Until October 31.
ID 38: Holbrook Summit
ID 33: Teton Pass
US 89: Geneva Summit
ID 29: Bannock Pass
I-15: Monida Pass
US 93: Lost Trail Pass
ID 36: Emigration Pass
ID 21: Beaver Creek Summit
ID 21: Mores Creek Summit
ID 87: Reynolds Pass
ID 55: Horseshoe Bend Hill Summit
ID 28: Gilmore Summit
US 30: Georgetown Summit
US 20: Targee Pass
US 95: Midvale Hill Summit
ID 21: Highland Valley Summit
US 93: Willow Creek Summit
US 30: Border Summit
US 20: Cat Creek Summit
I-90: Fourth of July Pass
ID 21: Banner Creek Summit
US 12: Lolo Pass
US 30: Fish Creek Summit
I-90: Lookout Pass
I-84: Sweetzer Summit
US 93: Nevada Line Pass
ID 31: Pine Creek Pass
US 95: White Bird Hill Summit
ID 71: Brownlee Summit
US 95: Lewiston Hill Summit
ID 75: Galena Summit
I-15: Malad Summit
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Mountain Pass Mountain Pass