The Arizona Department of Transportation (ADOT), in conjunction with the Federal Highway Administration (FHWA), has begun Phase II of a study to determine how best to improve mobility along Interstate 10, between the intersection with Interstate 19 to Kolb Road, southeast of downtown Tucson. Another major component of this study is to identify a new alignment of State Route (SR) 210 (Barraza Aviation Highway) that would connect the existing corridor with I-10 east of downtown.
Making improvements along this section of I-10 is intended to help with the congestion in downtown Tucson, which is a major goal for ADOT, the city of Tucson, Pima County, and the Pima Association of Governments.
Phase I of this study was completed in 2015 and consisted of an engineering “feasibility report” that examined future transportation needs and potential improvements to both I-10 and SR 210. Phase II of this study includes the preparation of a Design Concept Report and Environmental Assessment (EA). With FHWA acting as the lead federal agency, the EA will be developed in accordance with the National Environmental Policy Act (NEPA) of 1969. In conclusion, the EA will describe the project’s purpose and need, evaluate the two alternatives that are being considered, and analyze the environmental impacts of both alternatives. All agency coordination and public involvement will also be documented in the EA.
Both alternatives under consideration involve expanding the number of I-10 travel lanes between Alvernon Way and Kolb Road, with one option looking at the possibility of turning that segment of I-10 into a “collector-distributor” highway, which would feature local traffic lanes with direct access to traffic interchanges and express lanes that bypass some ramps.
In both alternatives, Alvernon Way from the connection with Golf Links to I-10 would be designated as the extension of SR 210 and would include construction of a traffic interchange at I-10.
The study team will work with agency partners, stakeholders, and the public to evaluate the two alternatives, as well as the merits of a “no-build” option.
For more information about this project, please call the ADOT Project Information Line at 855.712.8530 or email Projects@azdot.gov with questions or comments.