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
Completed 2015 - Passing and climbing lanes provide additional lanes for vehicles to safely pass other vehicles while maintaining speeds. Implementing passing and climbing lane projects provides traffic operational and safety benefits at a cost that is far less than fully widening a highway. In an
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
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
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
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
Completed 2016 - ADOT conducted a pilot program to study lighting and the effects of converting the current lighting system from High Pressure Sodium (HPS) to Light Emitting Diode (LED).
The goal of the pilot program was to better evaluate potential energy savings, cost savings, operation of the
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 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
Completed 2021 - ADOT completed this study to address the wildlife-vehicle-conflicts on Arizona's state highways that result in fatalities, serious injuries, property damage, and loss of wildlife. The study analyzed information on existing crash data, previously completed studies, wildlife linkage