Information related to the construction schedule, traffic alerts, detours and restrictions/closures can be found in this section. If you live or travel near the project, be sure to sign up for updates and alerts. To learn about meetings and events, please visit the Outreach page.
Preliminary construction of the South Mountain Freeway began in September 2016 with improvements to the I-10/Loop 202 (Santan Freeway) interchange, including extending Loop 202 HOV lanes and widening the shoulders to Pecos Road near 48th Street.
Major construction of the 22-mile freeway project began in early 2017 in the I-10 Papago, Salt River and Pecos segments. Visit the segment pages for detailed construction information, including a 2017-2018 schedule and maps of major activities starting late-2017 to mid-2018.
Most construction will occur on weekdays, although some construction activities will require work every day and at night to complete the freeway by late 2019.