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| Loop 303 (Arizona) | |
|---|---|
| State | AZ |
| Type | Loop |
| Route | 303 |
| Alternate name | Bob Stump Memorial Parkway |
| Length mi | 51.95 |
| Established | 1991 |
| Direction a | South |
| Terminus a | I‑10 in Phoenix |
| Direction b | North |
| Terminus b | I‑17 in Cordes Junction |
| Counties | Maricopa County |
Loop 303 (Arizona) is a controlled‑access highway in Maricopa County serving the western and northwestern suburbs of Phoenix. The route forms a partial beltway linking Tolleson, Avondale, Goodyear, Litchfield Park, Waddell, Surprise, and Wickenburg‑adjacent corridors. It is officially designated the Bob Stump Memorial Parkway and connects to multiple major routes including Interstate 10 and Interstate 17.
Loop 303 begins at a junction with I‑10 near Tolleson and proceeds northwest as a divided freeway, paralleling SR 85 and providing access to Phoenix Goodyear Airport and the Luke Air Force Base training corridors. The alignment crosses the Gila River floodplain and intersects arterial corridors including Pioneer Road, Van Buren Street, Peoria Avenue, and Bell Road before curving north toward I‑17. Along its length the parkway transitions through suburban growth areas, industrial parks near Avondale Municipal Airport, and desert landscapes abutting the White Tank Mountains and Harquahala Mountains.
Planning for a western bypass of Phoenix dates to regional studies by the Maricopa Association of Governments and ADOT in the late 20th century, influenced by population trends tied to Sun Belt expansion, Arizona State University growth, and military base realignment at Luke AFB. Initial right‑of‑way acquisitions and corridor designations occurred amid debates involving Maricopa County officials, local municipalities such as Goodyear and Surprise, and federal agencies including the FHWA. The highway was named to honor Bob Stump following state legislative action.
Construction proceeded in segments funded by combinations of state transportation appropriations, federal aid from the FHWA, and local bonds approved by bodies like the Maricopa County Board of Supervisors. Early segments opened in the 1990s and 2000s, with major freeway upgrades executed by contractors working under ADOT contracts influenced by standards from the AASHTO. Significant interchanges were built at I‑10, US 60, and arterial crossings near Bell Road, using design–build delivery on later phases similar to projects overseen by the ADOT and reviewed by the EPA for environmental compliance. Improvements included pavement rehabilitation, drainage structures across the Gila River basin, and noise mitigation adjacent to communities such as Litchfield Park.
ADOT and regional planning agencies have proposed northward extensions to complete a connection with I‑17 and to potentially create a western loop around Phoenix linking with routes like SR 85 and US 60. Proposals have been discussed in the context of the MAG long‑range transportation plan and federal infrastructure initiatives tied to the Bipartisan Infrastructure Law. Local governments including Surprise and Peoria have weighed zoning and land use compatibility, while stakeholders such as Valley Metro and the Arizona Commerce Authority consider multimodal integration. Environmental reviews under the NEPA and funding scenarios involving FTA or FHWA programs remain part of planning.
Loop 303 serves commuter flows between Phoenix suburbs and the Sonoran Desert‑edge employment centers, supporting trips to Luke AFB, Phoenix Goodyear Airport, and distribution parks used by logistics firms such as those contracting with UPS and FedEx. Traffic counts monitored by ADOT show peak volumes near I‑10 and growing weekday commuter demand toward Surprise and Wickenburg corridors. Freight movement along the corridor connects to interstate networks including I‑10 and I‑17, affecting regional supply chains and firms like Amazon that use nearby distribution sites.
The exit list includes interchanges with major and minor arterials established by ADOT numbering conventions: the southern terminus at I‑10, intermediate exits serving local arterials including Dysart Road, Litchfield Road, Estrella Parkway, and northern connections planned toward I‑17. Each interchange follows standards referenced by the MUTCD and regional signage practices.
Major intersections along the parkway include junctions with I‑10, US 60, arterial crossings at Van Buren Street, Peoria Avenue, Bell Road, and the planned northern terminus connecting to I‑17. These connections link to broader corridors such as SR 85 and national freight routes managed in coordination with the FHWA.
Loop 303 has influenced residential growth in municipalities like Surprise, Goodyear, and Avondale, stimulating master‑planned communities marketed by developers linked to firms such as D.R. Horton and PulteGroup. Commercial development near interchanges includes shopping centers anchored by chains like Walmart and Target, while industrial parks attract logistics tenants including Amazon and third‑party logistics providers. Economic development agencies including the Arizona Commerce Authority and local chambers of commerce in Buckeye and Peoria cite the loop as a factor in corporate site selection. Community concerns addressed through public meetings involved school districts such as Peoria Unified School District and environmental groups citing Audubon Society interests in Sonoran Desert habitats.
Category:Highways in Arizona