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I-84, Vista Avenue Interchange

Project Facts

This project rebuilt the Vista Interchange (the bridge was built in 1969) with a Single Point Urban design, which places a traffic signal at the center and allows for protected left turns in each direction. The new interchange will have two through lanes in each direction and dual left-turn lanes. On- and off-ramps will be widened and lengthened to improve traffic flow. The new bridge also will accommodate the expansion of I-84.


The Vista Interchange is vital to Idaho’s economic health, as it provides access to and from the Boise Airport. Improving the interchange will provide the capacity needed to meet growing commuter, business and airport needs through 2035.


This project is a result of an Environmental Assessment and a planning study for I-84 from just west of the Orchard Interchange to the Isaacs Canyon Interchange (Eisenman Road). The interstate, built in the late 1960s, was not designed to handle the current traffic volumes. The study recommended improvements for this corridor, including replacing the existing pavement, adding lanes to the interstate, installation of soundwalls, and reconstructing the Orchard, Vista, Broadway, and Gowen interchanges to meet future traffic capacity requirements.

ITD received environmental approval for this project from the Federal Highway Administration in November 2007. For more information about the Environmental Assessment, click here.

  • Preliminary Design completed: April 2008
  • ROW acquisition completed: April 2009
  • Final Design completed: May 2009
  • Advertised: May 12, 2009
  • Bids opened: Bids open June 16, 2009
  • Contractor: Central Paving Co Inc., Boise
  • Contract awarded: June 30, 2009
  • Construction Start: July 9, 2009
  • Project Completion: September 2010

Contact Us
P.O. Box 7129 • Boise, ID 83707-1129
Ph: (208) 334-8119 • Fax: (208) 334-8563
TDD: (208) 334-4458

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Project Materials

Page Last Modified: 5/22/2014 4:12:20 PM

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Idaho Transportation Department
3311 W. State Street · P.O. Box 7129
Boise, ID 83707-1129