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 2014 - ADOT and the Federal Highway Administration completed an engineering and environmental study of I-10 between Tangerine and Ina roads. The goal for this study was to develop a long-range plan for providing an improved roadway for general traffic, commuters and truck traffic traveling along this portion of the I-10 corridor.

Completed 2013 - ADOT completed the study to assess the Interstate 10 corridor as a highway and as a travelshed to formulate a multimodal transportation plan that identifies a clear vision of the transportation roles of the corridor with respect to mobility.

Completed 2012 - ADOT, in association with the Federal Highway Association, evaluated improvements to I-19 to alleviate congestion and increase capacity within the corridor. The purpose of this project was to evaluate long-term improvements (2030) to I-19 between San Xavier Road and the I-10 / I-19 traffic interchange.

Completed 2016 - ADOT, in cooperation with the Federal Highway Administration (FHWA), initiated a Design Concept Report (DCR) and environmental study to evaluate the addition of one general-purpose travel lane in each direction on a 13-mile stretch of Loop 101 (Pima Freeway) from I-17 to Princess Drive.

The Planning Assistance for Rural Areas (PARA) program was sponsored by the Arizona Department of Transportation Multimodal Planning Division (MPD) and provided federal funds to assist tribal governments and counties, cities and towns located outside Transportation Management Area (TMA) planning boundaries with multimodal transportation planning needs. At the conclusion of Fiscal Year (FY) 2018, the PARA Program was discontinued.

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.