Completed Transportation Studies

Completed 2018 - This project updated the Statewide Intelligent Transportation System (ITS) Architecture for the State of Arizona.  The Statewide Architecture provides a common framework for planning, defining, and integrating intelligent transportation systems over the next 10 years and reflects the contributions of a broad cross section of the ITS community. 

Completed 2015 - In an effort to enhance safety and mobility on Arizona's roadways, the ADOT worked on updating the 2003 Passing and Climbing Lanes Prioritization Study. This update further refines the identification and prioritization methodology previously utilized and develops a prioritized list of candidate locations that would provide the most benefit to the traveling public.

Completed 2021 - The Arizona Department of Transportation (ADOT), in partnership with the Federal Highway Administration (FHWA), initiated a design concept study and related environmental studies to evaluate an interchange reconstruction at Houghton Road and Interstate 10 in Tucson, Arizona.

Completed 2020 - Interstate 10 is a major interregional and interstate freeway providing direct access to downtown Phoenix. The Inner Loop of I-10 spans between the I-10/I-17 Stack Interchange and the I-10/I-17 Split Interchange. This study encompassed the I-10 Inner Loop and extended from 35th Avenue to Sky Harbor Boulevard with an emphasis on the Deck Park Tunnel.

Completed 2018 - In 2012, the Arizona Department of Transportation and the Federal Highway Administration began working on a study to enhance traffic flow at the I-19 and Ruby Road traffic interchange and along the I-19 east frontage road from Ruby Road to Rio Rico Drive.

The Arizona Department of Transportation and the Federal Highway Administration are conducting engineering and environmental studies to develop a long-range plan for the improvement of the I-40 corridor west of the Bellemont traffic interchange (TI) to east of the Winona TI.

Completed 2017 - ADOT conducted this study to evaluate low volume state routes with less than 400 vehicles per day.  The study considered financial constraints, characteristics of the highway, and impact to the local jurisdiction and the regional transportation system to document opportunities and limitations and provide a basis for subsequent prioritized activities for the future management of each route. 

Completed 2019 - ADOT conducted this study to determine current and future traffic control needs for the I-10 corridor between Twin Peaks Road and 22nd Street.  The study determined if and when ramp metering infrastructure should be utilized and how it would operate. In addition, the study evaluated the traffic control at the frontage road junctions with the ramps to determine if the systematic "yield" control is appropriate or if "stop" control should be provided.

In 2010, the Arizona Department of Transportation, in coordination with the Federal Highway Administration and the Apache-Sitgreaves National Forest, completed an Initial Location / Design Concept Report on SR 260 from east of Overgaard at milepost 309.4 to the intersection of US 60 in Show Low at milepost 340.1. The Initial Location / Design Concept Report evaluated multiple alternatives to improve traffic flow and safety. Due to lack of funding, the project was canceled.