Drivers are encouraged to use U.S. 95 during construction to avoid full road closures and travel delays.

The contractor has brought in large steel containers and one-way barriers to prevent falling rock from entering the travel lane, and protect the crews working next to live traffic. It is not feasible to remove this set-up each weekend. Also, the contractor will be working as much as possible in the spring and fall to complete the work by late 2022. This approach better accommodates heavy weekend travel in the summer.

This segment of ID-55 sees a crash rate that is higher than normal. Many of the crashes involve speed or loss of control with no opportunity to correct because of the narrow, winding road.

The project is expected to be complete in late 2022. Crews will remove more than 140,000 tons of rock from the hillside to make room for the new roadway improvements and alignment. They will blast and excavate the existing rock carefully and safely over the course of the project.

The project team is coordinating closely with local emergency service providers and first responders to ensure safe passage through the work zone as needed. Dispatch has direct contact to onsite staff to coordinate access.

Smiths Ferry Drive will be closed to through traffic but will remain accessible to local residents and property owners.

25 mph.

The river will remain open during the summer. As a safety precaution, it will close for short durations during rock blasting operations in the fall and spring. Spotters will be located in the river to notify users of the closures.

Sign up for email updates and text notifications. Text notifications will be used to communicate full road closures and abnormal delays on ID-55. Email updates will be distributed regularly to provide information about the project. Drivers can also download the 511 app or visit 511.idaho.gov for travel information.

No. ITD has evaluated several alternatives over the past 20 years in order to improve safety and mobility on this stretch of ID-55, including this current project and a bypass. This project is more cost-effective and has fewer environmental impacts than the bypass.

No. The current project will not make any changes to Rainbow Bridge. ITD is working on a long-term plan to replace Rainbow Bridge that will increase mobility while preserving the historical bridge.

Loads are restricted to 13 feet wide, 75 feet long, and trailers are restricted to 48 feet long and must adhere to the 25-mph work zone speed limit. Any vehicles or loads above these restrictions are not allowed on ID-55 or through the work zone. 

The Idaho Transportation Department does not allow trailers longer than 48 feet or trucks with trailers longer than 75 feet to travel on ID-55 without a permit. Vehicles and loads are restricted to 13 feet wide, 75 feet long, and must adhere to the 25-mph work zone speed limit. To get a permit, visit trucking.idaho.gov/permits/.

The work zone follows the same restrictions in place for traveling on ID-55. For more information on permits, visit trucking.idaho.gov/permits/.