SH-21 construction in Idaho today

Every ITD work zone on SH-21 in Idaho today: lane closures, full closures, which direction and how long each lasts.

8 work zones · 0 full closures · updated every 15 minutes

Lanes open, work nearbyNorthboundBridge Work on SH-21 At Mores Creek Br. MM 17. 9/11/2026 7:00 AM MT to 5/28/2027 5:00 PM MT Mon, Tue, Wed, Thu, Fri, Sat, Sun: Active all day Width Restriction: 12ft Activities: Expect Delays, Reduced to Single Lane, Alternating Direction of Travel, Use Caution.until May 28
One lane, alternatingNorthboundUtility work on SH-21 from MM (34) to MM (38). Lane Alternating. 10/22/2026 8:30 AM MT to 11/20/2026 4:00 PM MT Mon, Tue, Wed, Thu, Fri: Active all day, Sat, Sun: Paused all day Activities: Expect Delays. Expect Delays: Under 15 minutesfrom Mon, Nov 2, 2:00 AM, until Nov 7
Lanes open, work nearbySouthboundBridge Work on SH-21 At Mores Creek Br. MM 17. 9/11/2026 7:00 AM MT to 5/28/2027 5:00 PM MT Mon, Tue, Wed, Thu, Fri, Sat, Sun: Active all day Width Restriction: 12ft Activities: Expect Delays, Reduced to Single Lane, Alternating Direction of Travel, Use Caution.until May 28
One lane, alternatingSouthboundBridge construction on SH-21 Both Directions near South Fork Payette River. Lanes Alternating. 4/29/2025 7:00 AM to 6/30/2027 8:00 PM Mon, Tue, Wed, Thu, Fri, Sat, Sun: 7:00 AM - 8:00 PM Width Restriction: 13ft Weight Restriction: 80000lbs Speed Restriction: 25mph Activities: expect delays, reduced to single lane, alternating direction of travel. Expect Delays: Under 15 minutesfrom Mon, Nov 2, 9:00 AM, until Nov 2
One lane, alternatingSouthboundBridge construction on SH-21 Both Directions near South Fork Payette River. Lanes Alternating. 4/29/2025 7:00 AM to 6/30/2027 8:00 PM Mon, Tue, Wed, Thu, Fri, Sat, Sun: 7:00 AM - 8:00 PM Width Restriction: 13ft Weight Restriction: 80000lbs Speed Restriction: 25mph Activities: expect delays, reduced to single lane, alternating direction of travel. Expect Delays: Under 15 minutesuntil Nov 1
One lane, alternatingNorthboundBridge construction on SH-21 Both Directions near South Fork Payette River. Lanes Alternating. 4/29/2025 7:00 AM to 6/30/2027 8:00 PM Mon, Tue, Wed, Thu, Fri, Sat, Sun: 7:00 AM - 8:00 PM Width Restriction: 13ft Weight Restriction: 80000lbs Speed Restriction: 25mph Activities: expect delays, reduced to single lane, alternating direction of travel. Expect Delays: Under 15 minutesuntil Nov 1
One lane, alternatingNorthboundBridge construction on SH-21 Both Directions near South Fork Payette River. Lanes Alternating. 4/29/2025 7:00 AM to 6/30/2027 8:00 PM Mon, Tue, Wed, Thu, Fri, Sat, Sun: 7:00 AM - 8:00 PM Width Restriction: 13ft Weight Restriction: 80000lbs Speed Restriction: 25mph Activities: expect delays, reduced to single lane, alternating direction of travel. Expect Delays: Under 15 minutesfrom Mon, Nov 2, 9:00 AM, until Nov 2
One lane, alternatingSouthboundUtility work on SH-21 from MM (34) to MM (38). Lane Alternating. 10/22/2026 8:30 AM MT to 11/20/2026 4:00 PM MT Mon, Tue, Wed, Thu, Fri: Active all day, Sat, Sun: Paused all day Activities: Expect Delays. Expect Delays: Under 15 minutesfrom Mon, Nov 2, 2:00 AM, until Nov 7

Other Idaho highways

From the Idaho Transportation Department's work zone feed (WZDx), as Orbit keeps it. Closures can change at short notice; follow the signs on the road. Some work zones come with few details from ITD.

Driving SH-21?Orbit warns you about work zones ahead on your side of the road, and goes quiet when drivers are getting through at speed.

See Orbit SI →