Map and Visual Breakdown: Where Adot Is Tearing up Loop 303 from I-17 to West Valley
Tracking the State Route 303 map reveals two major active work zones on opposite ends of the loop. To the north, ground crews are excavating roadbeds and driving bridge pilings where Loop 303 meets Interstate 17 near north Phoenix. This junction serves as the primary gateway for commercial traffic heading toward northern Arizona and Flagstaff, making continuous access essential even while heavy machinery operates adjacent to the main travel lanes.
Further south, the landscape changes near Interstate 10. The state launched a dedicated $613 million Loop 303 expansion in Goodyear, converting aging segments into high-capacity freeway infrastructure. The project targets the corridor between Van Buren Street and MC 85, where industrial logistics facilities operate day and night. Drivers in this sector will face Loop 303 lane restrictions, temporary bypass routes, and rolling barricades that divert heavy traffic onto frontage corridors.
Crews are cutting temporary access pads and positioning concrete barriers along the shoulders. Motorists traveling through Peoria, Surprise, and Goodyear should expect shifts in lane striping and narrower clearances. ADOT road construction updates indicate that speed limits throughout these active work zones drop to 55 mph, with law enforcement running targeted patrols during peak morning and evening commute windows.
