Idaho Transportation Department

I-84 Five Mile Bridge

Project Description

I-84 , Five Mile Bridge, Boise
Key No. 09493
ITD Project BR-84-1(069)48

The Idaho Transportation Department (ITD) rehabilitated and resurfaced the Five Mile Bridge over Interstate 84 in summer 2009. The project rehabilitated the bridge deck, repaired deteriorated pavement, extended the life of the structure and provided a smoother ride for motorists. Additional improvements (such as additional travel lanes, bike lanes or sidewalks) are not planned as part of this project. Improvements of that magnitude would require total replacement of the bridge structure, and funding for such an extensive project is not currently available.

Planned Construction Schedule

Construction on the project began July 13 and finished August 3, 2009. To expedite repairs, the bridge will temporarily close for construction in summer 2009. This "get in, get out" schedule includes several benefits:

Construction is reduced from 40 days to approximately 25 days.
Full flow of traffic is restored nearly two weeks earlier than if the bridge were to remain open.
The finished roadway surface is constructed in one efficient process.
A cost savings is expected. By closing the bridge, standard construction costs such as temporary traffic signals, and the need for flaggers, are automatically eliminated.

Project Background

The Five Mile Bridge, built in 1966, carries more than 18,000 vehicles a day. By 2031, average daily traffic is projected to exceed 19,250. The bridge is part of a heavily-traveled north-south corridor in west Boise, adjacent to residential, retail and business centers, making it an important transportation link in the area.

Compliance with Title VI of the Civil Rights Act

The Idaho Transportation Department (ITD) is committed to compliance with Title VI of the Civil Rights Act of 1964 and all related regulations and directives. ITD assures that no person shall on the grounds of race, color, national origin, gender, age, or disability be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any ITD service, program, or activity. The department also assures that every effort will be made to prevent discrimination through the impacts of its programs, policies, and activities on minority and low-income populations. In addition, the department will take reasonable steps to provide meaningful access to services for persons with Limited English Proficiency.