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| State Route 143 (Arizona) | |
|---|---|
| State | AZ |
| Type | SR |
| Route | 143 |
| Length mi | 4.85 |
| Direction a | South |
| Terminus a | I‑10 / Papago Freeway |
| Direction b | North |
| Terminus b | Dunlap Avenue / Buckeye Road area |
| Counties | Maricopa County |
State Route 143 (Arizona) is a short north–south state highway on the east side of Phoenix, Arizona. It connects I‑10 and the Papago Freeway to local arterials serving the Phoenix Sky Harbor International Airport, Eastlake, and Downtown Phoenix vicinity. The route functions as a limited-access connector, facilitating movements between Tempe, Mesa, Scottsdale, and central Phoenix.
State Route 143 begins at an interchange with I‑10 near the Papago Park area, immediately adjacent to Phoenix Sky Harbor International Airport and the Salt River. Heading north, the highway passes between the Terminal 4 complex of the airport and the Phoenix Municipal Stadium corridor, offering ramps used by travelers connecting to Cochise County-bound routes and local thoroughfares. The alignment crosses under Van Buren Street and runs parallel to the PHX Sky Train right-of-way, intersecting with McDowell Road and providing access toward Camelback Mountain views and the Desert Botanical Garden region. Continuing northward, the route terminates near the surface network at Dunlap Avenue and the Buckeye Road/Indian School Road grid, feeding traffic into neighborhoods that lead toward Paradise Valley and central Phoenix. The corridor is primarily grade-separated with short at-grade transitions, and includes connections that serve cargo movements to Sky Harbor Cargo Complex and transit links to Valley Metro Rail stations.
The corridor that became State Route 143 was planned during postwar growth linked to Phoenix Symphony Hall-era civic expansion and the rise of Sky Harbor International Airport as a regional hub. Initial proposals emerged amid discussions involving the Arizona Department of Transportation and the Maricopa Association of Governments as part of broader freeway planning that included Interstate 10 and the Papago Freeway. Construction phases were coordinated with projects tied to Downtown Phoenix redevelopment and the expansion of Tempe Town Lake-era infrastructure. Over time, modifications responded to events such as the Super Bowl XLII preparations and federal Federal Aviation Administration rules affecting airport access. Jurisdictional adjustments involved negotiations with Phoenix City Council and Maricopa County authorities, including right-of-way acquisitions from entities such as the Salt River Pima–Maricopa Indian Community. Significant upgrades were completed to support the opening of new terminals and to meet standards promoted by the American Association of State Highway and Transportation Officials.
The major intersections along State Route 143 serve as nodes linking to prominent regional routes and institutions: - Southern terminus: interchange with I‑10 / Papago Freeway near Sky Harbor International Airport and Phoenix Convention Center. - Ramps to Van Buren Street providing surface access toward Arizona State University satellite facilities and the Downtown Phoenix core. - Connections for airport terminals and cargo facilities adjacent to McDowell Road and the PHX Sky Train stations servicing Terminal 3/Terminal 4. - Northern terminus: transition to local arterials at Dunlap Avenue and nearby links toward Indian School Road and Buckeye Road, offering access to Paradise Valley and North Phoenix.
Traffic volumes on State Route 143 reflect heavy use by airport passengers, cargo carriers, and commuters linking east‑valley suburbs such as Tempe, Mesa, and Scottsdale to Downtown Phoenix. Peak weekday flows increase during Phoenix Suns home games at the nearby facility and during major conventions at the Phoenix Convention Center. The corridor accommodates truck movements associated with the Sky Harbor Cargo Complex and sees modal transfers involving Valley Metro Rail and PHX Sky Train connections. Seasonal spikes occur during events like the Arizona State Fair and Phoenix Open golf tournament, prompting operational adjustments coordinated with Arizona Department of Public Safety and Maricopa County Department of Transportation.
Planned improvements for the corridor have involved proposals from the Arizona Department of Transportation and the Maricopa Association of Governments to enhance capacity, safety, and multimodal connectivity, aligning with regional initiatives tied to Valley Metro expansion and airport modernization projects championed by the Phoenix Aviation Department. Concepts include revised interchange geometry near I‑10 to reduce weaving conflicts, upgraded ramp braids to support increased freight from the Ports of Los Angeles and Long Beach logistics network, and pedestrian/transit access upgrades connecting to PHX Sky Train and Valley Metro Rail expansion plans. Stakeholder engagement has included input from the Phoenix City Council, Greater Phoenix Economic Council, and local neighborhood associations representing North Mountain and Camelback East communities; environmental assessments have referenced guidance from the Federal Highway Administration and the Environmental Protection Agency concerning air quality and noise mitigation. Implementation timelines depend on funding allocations from sources such as the Federal Transit Administration grants, state transportation bonds, and regional sales tax measures overseen by the Maricopa County Board of Supervisors.
Category:State highways in Arizona Category:Transportation in Phoenix, Arizona