Interstate 10 and State Route 210 Study

The Arizona Department of Transportation (ADOT) has prepared a Draft Environmental Assessment (EA) and Initial Design Concept Report (DCR) to study potential improvements to two important corridors that serve the Tucson area:

  • Interstate 10 (I-10) from the I-10/Interstate 19 (I-19) interchange to Kolb Road
  • State Route 210 (SR210) (Barraza‑Aviation Parkway) from Golf Links Road to a future connection with I-10 along Alvernon Way

Background

I-10 / SR 210 Project Map

Beginning in 2011, Phase 1 of the long-range planning process for these corridors included a Feasibility Study and Environmental Overview. The Feasibility Study, which was completed in 2015, examined future transportation needs and potential improvements, and the Environmental Overview identified potential environmental issues in the study area. Based on the Feasibility Study, two build alternatives and one "no-build" (nothing changes) alternative are being studied in Phase 2.

Phase 2 of the study was initiated in 2016 and includes an Environmental Assessment (EA)  and a Design Concept Report (DCR) which identify and evaluate potential improvements to I-10 from the I-10/I-19 interchange to Kolb Road and SR210 from Golf Links Road to a future connection with I-10 along Alvernon Way.

Initial Design Concept Report

The Initial DCR refines two alternatives, System Alternative I and System Alternative IV, identified in the Feasibility Study. The recommended alternative, System Alternative I, was developed based on public and agency input received, as well as the technical analysis of multiple connection points between SR210 and I-10.

System Alternative I (Recommended Alternative)

  • Designate Alvernon Way as SR 210 from Golf Links Road to the I-10
  • Add a new system interchange to provide access from SR210 to I-10
  • Add up to two (2) lanes in each direction on I-10 from the I-10/I-19 interchange to Alvernon Way
  • Add up to four (4) lanes in each direction on I-10 from Alvernon Way to Kolb Road

System Alternative IV

  • Designate Alvernon Way as SR 210 from Golf Links Road to the I-10
  • Add a new system interchange to provide access from SR 210 to I-10
  • Add up to two (2) lanes in each direction on I-10 from the I-10/I-19 interchange to Alvernon Way
  • Modify I-10 from Alvernon Way to Kolb Road to serve as a collector-distributor roadway, adding up to four (4) lanes in each direction

No-Build Alternative

  • Do nothing

Both proposed system alternatives will add or improve interchanges, widen or replace existing bridges, and remove some existing interchange ramps to improve spacing and traffic flow on I-10. If the No-Build alternative is chosen, no action will be taken.

Draft Environmental Assessment

The Draft EA evaluates potential social, economic, and natural environmental impacts on multiple environmental resource categories including air and water quality, biological resources, land use, noise, and neighborhood and community impacts. Ultimately, the Final EA will determine if this study will result in a Finding of No Significant Impact or not. The Draft EA has been prepared in accordance with the National Environmental Policy Act.

Study Process

Two public information meetings were held on Nov. 28 and 29, 2018. The meetings presented information on the three alternatives mentioned above. After review of agency and public comments, a recommended alternative was identified and presented during the Draft EA and Initial DCR review period, which ran from October 29 to December 12, 2019. Comments collected during this period will be incorporated into the Final EA. Both the Draft EA and Initial DCR are being finalized and an alternative will be selected.