SR 89A - SR 179 Sedona Intersection Modernization

Project Overview

The project originally consisted of slip lanes that would be added for SR 89A drivers heading from West Sedona to southbound SR 179, and 179 drivers headed northbound on 89A toward uptown. The site is a known bottleneck for traffic at certain times. Before any major components were constructed, analysis of directional signing and turn restrictions with a dedicated right-turn lane was completed at the "Y" roundabout to test the effectiveness of simpler solutions.

After an analysis of the data in summer 2020, the ADOT project team and the City of Sedona did not see enough of a benefit from the dedicated right-turn lane test and the slip lane modeling to continue moving forward with the project as previously scoped.

As a result, the proposal to put a slip lane from 89A from West Sedona to southbound 179 through ADOT property will not be pursued; no lanes will be added or changed; and there will be no encroachment on private property. Enhancements to the roundabout will include signage, striping and minor pavement rehabilitation to improve efficiency at the site.

    Project Area Map

    Sedona Intersection Map

    Stakeholder Updates


    About the Project

    Construction is expected to start in late July or early August 2021 and be complete in the early fall. Mill-and-fill work will entail removing the existing surface layer with a milling machine. New asphalt will then be used to replace the milled location, adding years of life to the road surface. Access to the traveling public will be maintained at all times, with no full closure of the roadway.

    Project Schedule

    • Final Design – Currently underway through early 2021
    • Construction – Summer 2021

    Schedule subject to change based on weather or other unforeseen factors.

    Stay Informed!

    ADOT welcomes your questions and comments. Please contact us in any of these ways:

    • By email: Subscribe to receive project updates and traffic alerts.
    • By phone:  Call the ADOT Bilingual Project Information Line at 855.712.8530.
    • Online: Submit a question or comment through the ADOT website. Visit and then select Projects from the dropdown menu.
    • By mail:  Write to ADOT Community Relations, 1655 W. Jackson St., MD 126F, Phoenix, AZ 85007