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 2021 - ADOT completed the study to assess the needed traffic control at the junction of freeway off ramps and frontage roads. The study analyzed 65 locations and developed recommendations for stop, yield and no traffic control on one and two lane frontage roads based on crash history, traffic volume, roadway geometrics and posted speed limits. The study recommendations provide general traffic control guidance that will be further evaluated based on the unique needs of each project location on a case by case basis.

Completed 2017/2018 - ADOT conducted Corridor Profile Studies. The Statewide Map shows all the corridors that were being studied. The studies under this program provide a strategic vision for assessing the overall health of the state's primary highways, assisting the agency with transitioning to a performance-based project programming system through targeted investments.

Completed 2010 - This Final Design Concept Report describes the development and evaluation of capacity improvement alternatives on Interstate 10 (I-10) from near its junction with Interstate 8 (Milepost 196) to Tangerine Road (Milepost 240).  The goal of the study was to develop a long-range master plan for the I-10 corridor in accordance with the approved regional and local transportation plans; to optimize the traffic operations within the corridor for 2030 traffic demand; to retain local access at existing traffic interchanges, to plan for new interchange locations; and to minimize or mitigate impacts the improvements may have on the surrounding community.

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 2015 - During the five-year study, ADOT worked closely with the Federal Railroad Administration (FRA) and other federal agencies, as well as local governments and planning organizations in Maricopa, Pinal and Pima counties, to determine the feasibility of a passenger rail system between Tucson and Phoenix.