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Thanks to new innovation, ITD will close 60 miles of lanes in the heart of the Treasure Valley with minimal impact to drivers



New innovation enables ITD to perform 100 miles of hot-chip sealing in the heart of Boise.  Tomorrow, crews will begin work on Broadway Avenue, followed by State Street between State Highway 16 and Linder Road, and Chinden Boulevard.  Work is weather dependent and can change.  The project is expected to be completed after the summer of this year.

The Idaho Transportation Department (ITD) is applying hot-chip sealing to more than 100 miles of roadway in the heart of Boise with minimal impact to drivers as the work will all be done overnight. This new innovative approach to chip sealing underlines ITD’s commitment to embracing new technologies that reduce impact for users.

Unlike a regular chip seal, the hot chip seal on this project allows all work to be carried out overnight. Traditional chip seal uses oil heated to about 150 degrees that can be applied in high daytime temperatures. Hot chip seal requires the oil to be heated to 300 degrees so it can be applied during overnight lows. Another key benefit is that drivers can use the roadway within 30 minutes of chip sealing, compared to the 24-hour wait required with regular chip sealing. This high-temperature process not only extends the life of the road surface, but also minimizes disruptions to businesses and motorists.

Tomorrow, crews will begin work on Broadway Avenue, followed by State Street between State Highway 16 and Linder Road, and Chinden Boulevard. Work is weather dependent and can change. The project is expected to be completed after the summer of this year.

During construction, motorists can expect the following:

  • Work on one section of road at a time
  • Night work from 9:00 PM to 6:00 AM
  • Access to homes and businesses is guaranteed at all times
  • Lane closures, with at least one lane open in each direction
  • Changing traffic patterns
  • Flags on the roadway
  • Speed ​​limits reduced

In anticipation of this project, ITD installed the first-ever hot chip seal on two miles of State Highway 21 last summer to ensure the results could be replicated in a busier environment. These projects are the first in the state to use this process.

Those interested in learning more about the project are encouraged to sign up for email updates by visiting https://itdprojects.idaho.gov/pages/adachipseal.