Idaho Transportation Department Logo Idaho Transportation Department   Highway Info
ID 21
ID 21: Road construction, roadway reduced to one lane, look out for flaggers, loose gravel, delays, speed restrictions in force, width limit in effect.
Between Main Street and Mores Creek Summit (11 miles north of the Idaho City area). Road construction work is in progress. The roadway is reduced to one lane. Look out for flaggers. Look out for loose gravel on the roadway. Expect delays. Speed restrictions are in force. There is a width limit in effect. Expect 10 - minute delays.. Width limit 12'0". From 7:00AM MDT to 12:00PM MDT on Fridays and from 7:00AM MDT to 7:00AM MDT on Mondays, Tuesdays, Wednesdays and Thursdays. Until September 10.

Comment: Traffic will be reduced to a single lane initially under flagger control for each of the operations at their respective locations. As the micro-milling progresses pavement markings will be removed resulting in a continuous no passing zone until restriping after sealcoat operations. During the sealcoat operations until all brooming and restriping is completed speed limits will be posted at 35 MPH.
Last updated on July 14
Switch to Winter Driving Conditions
Switch to Road Reports
Truck Restrictions on ID 21
Map of Reports on ID 21 Between Highland Valley Summit and Daggett Grade Road (8 to 13 miles north of the Boise area). Road construction work is in progress. The roadway is reduced to one lane. Look out for flaggers. Expect delays. Expect 5 - minute delays. From 7:00AM MDT to 12:00PM MDT on Fridays and from 7:00AM MDT to 7:00PM MDT on Mondays, Tuesdays, Wednesdays and Thursdays. Until October 3. Between Highland Valley Summit and Daggett Grade Road (8 to 13 miles north of the Boise area). Road construction work is in progress. There is work on the shoulder. The roadway is reduced to one lane. Expect delays. Look out for flaggers. Expect 5 - minute delays. From 7:00AM MDT to 12:00PM MDT on Fridays and from 7:00AM MDT to 7:00PM MDT on Mondays, Tuesdays, Wednesdays and Thursdays. Until November 6. Between Daggett Grade Road (14 miles south of the Idaho City area) and King Road (Idaho City). Utility work is in progress. The roadway is reduced to one lane. Look out for flaggers. Short delays are possible. From 7:00AM MDT to 12:00PM MDT on Fridays and from 7:00AM MDT to 5:00PM MDT on Mondays, Tuesdays, Wednesdays and Thursdays. Until Thursday, at about 11:59PM MDT. Between Main Street and Mores Creek Summit (11 miles north of the Idaho City area). Road construction work is in progress. The roadway is reduced to one lane. Look out for flaggers. Look out for loose gravel on the roadway. Expect delays. Speed restrictions are in force. There is a width limit in effect. Expect 10 - minute delays. Width limit 12'0". From 7:00AM MDT to 12:00PM MDT on Fridays and from 7:00AM MDT to 7:00AM MDT on Mondays, Tuesdays, Wednesdays and Thursdays. Until September 10. Between Warm Springs Creek Airport Road and Banner Creek Summit (33 to 36 miles south of the Stanley area). Road maintenance work is in progress. The roadway is reduced to one lane. Look out for flaggers. Short delays are possible. From 8:00AM MDT to 5:00AM MDT on Monday, Tuesday and Wednesday. Until Wednesday, at about 5:00PM MDT.
ID 21: Road construction, roadway reduced to one lane, look out for flaggers, loose gravel, delays, speed restrictions in force, width limit in effect.
Google Static Map Image
Closure Closure Restriction Restriction Spring Breakup Spring Breakup
Truck Ramp Truck Ramp Weigh Station Weigh Stations