U.S. 20 Overview

Since 2004, ITD has engaged in an extensive highway corridor planning effort for U.S. 20 from Chester to the Montana state line – Idaho’s gateway to Yellowstone National Park. The U.S. 20 Corridor Plan is a long-range planning effort examining land uses, existing infrastructure, traffic, and environmental conditions along U.S. 20. ITD has been working with the IDFG as the state’s wildlife specialist, per an MOU and the Henry’s Fork Legacy Project throughout this process. The purpose of the plan is to assess the condition of the U.S. 20 corridor and identify the necessary improvements to meet the corridor’s system and user needs for the next 20 years.

In response to public comments during the scoping process for the Targhee Pass EA, and to continue efforts identified in the U.S. 20 Corridor Plan, the project goals and objectives have been refined. They now include evaluating improved safety for pedestrians and bicycles, reducing collisions between wild animals and vehicles (a goal is to reduce property damage and injuries associated with collisions and to protect wild animals), and maintaining wildlife movement across the corridor for several species.

The Idaho Transportation Department and Idaho Department of Fish & Game (IDFG) are working together to identify prudent and reasonable safety solutions that reduce wildlife-vehicle collisions (WVC) and maintain or enhance local and migratory animal movement.

Please visit the U.S. 20 Corridor Plan Story Map for additional information.