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SR202L, 101L to SR51

Phoenix, Arizona

Market Sector

Bridge, Surface Transportation


Conventional, Roadway Design

Services Provided




As a component of the voter-approved Maricopa Association of Governments Regional Transportation Plan, the Arizona Department of Transportation completed a roadway widening project on the Loop 202 (Red Mountain Freeway). The widening (7.5 miles and 22 bridges, including the mile-long Salt River Bridge) project will result in additional eastbound lanes on Loop 202 between SR 51 (Piestewa Freeway) and Loop 101 (Price Freeway), and additional westbound lanes between Loop 101 and Scottsdale/Rural Road within the cities of Phoenix and Tempe. The additional general-purpose lanes in this corridor have increased the freeway capacity and will continue to help alleviate increased levels of traffic congestion.

As a part of the Design Build Contracting Team (Kiewit/Sundt Joint Venture), TYLIN was responsible for the two major bridge crossings on the project, the mile-long Salt River Bridge and the Indian Bend Wash Bridge. TYLIN was also responsible for the overall independent technical reviews of all 22 bridges along this corridor and miscellaneous structures including traffic sign structures, retaining walls and lightweight noise panels.

Project Highlights:

  • Widening of the mile-long Salt River Bridge (largest bridge in Arizona) using precast girders and deep drilled shafts.
  • Value engineering opportunities included the reuse of sign structure foundations and reducing lengths of drilled shafts.
  • Technical oversight (QA/QC ) for all 22 bridges on the project.