Several significant road improvement initiatives in the Flagstaff area have encountered typical seasonal interruptions due to winter conditions. The Arizona Department of Transportation has paused work on the I-17 Willard Springs Wildlife Overpass, located south of Flagstaff between mileposts 322 and 331, with construction scheduled to resume in spring 2026.[1]
Similarly, preparations continue for other ADOT efforts, including the installation of variable speed limit signs along I-40 between Bellemont and Flagstaff (mileposts 185-195) to enhance safety during inclement weather. This project is expected to begin in spring 2026 and complete by late fall.[1]
Lone Tree Corridor Ongoing
Locally, the Lone Tree Corridor Overpass Project began construction on February 18, 2025, and is ongoing through 2026. The work will extend Lone Tree Road with a new north-south connection between Butler Avenue and Route 66.[2]
The City of Flagstaff has also outlined plans for its 2026 Road Repair and Street Safety work program, with a staff deadline of March 18 ahead of contract award on April 7. This annual effort will address deteriorated streets through milling, paving, and safety enhancements.[3]
These developments signal a busy season ahead, as the Lone Tree project continues and paused highway works resume in spring, potentially impacting commutes but promising improved mobility and safety infrastructure.
The content of this article was computed by analyzing available sources.