Transportation Studies

This section provides information about projects in the study/decision-making phase. Learn more about projects in the construction phase on the Projects page.
I-11 and Intermountain West Corridor Study

The study includes detailed corridor planning of a possible high-priority interstate link between Phoenix and Las Vegas, and high-level visioning for potentially extending the corridor north to Canada and south to Mexico.

Sonoran Corridor Tier 1 Environmental Impact Statement 

In February 2017, the Federal Highway Administration (FHWA) and ADOT initiated the environmental review process for the Sonoran Corridor, a potential new transportation corridor route that would connect Interstate 19 to Interstate 10 south of the Tucson International Airport.  A Tier 1 Environmental Impact Statement (EIS) is being prepared as part of this process in accordance with the National Environmental Policy Act (NEPA) and other regulatory requirements

State Route 189 Study: International Border to Grand Avenue

ADOT and the Federal Highway Administration began working on an engineering and environmental study for SR 189 (Mariposa Road) in 2011. The goal of the study is to develop a long-range plan for future improvements between the U.S.-Mexico border and Grand Avenue. The Draft Environmental Assessment (EA) was available for a 30-day public review and comment period from Jan. 13 - Feb. 14, 2017. A public hearing to provide input on the Draft EA was held Jan. 31. 2017. The final Environmental Assessment resulted in a Finding of No Significant Impact approved on November 2, 2017.

Grand Canyon National Park Airport Master Plan

The goal of the Airport Master Plan is to provide the framework needed to guide future airport development that will cost-effectively satisfy aviation demand, while considering potential environmental and socioeconomic issues.

North South Corridor Study

A highway study in Pinal County that would improve regional connectivity, provide an additional way of getting around a growing area of the Sun Corridor, and address current and future transportation needs in a growing area is moving forward under a new environmental review process. The project scope also incorporates the extension of State Route 24 from Ironwood Drive to the North South Corridor.

More Studies

ADOT Planning Study GIS Template Data

Please download the template data and submit the completed attributes table for each project recommended from the planning study to the ADOT MPD Project Manager upon completion of the planning study.  A data dictionary of the GIS data is included so users can understand what the fields represent.  Please download a new copy of the template for each study as the template may be updated.  If you have any questions please contact Patrick Whiteford of the GIS group at 602.712.8591.

The Arizona Ombudsman – Citizens Aide helps you resolve ongoing issues with State Agencies.

Civil Rights

Pursuant to Title VI of the Civil Rights Act of 1964, the Americans with Disabilities Act (ADA) and other nondiscrimination laws and authorities, ADOT does not discriminate on the basis of race, color, national origin, sex, age, or disability. Persons that require a reasonable accommodation based on language or disability should contact ADOT’s Civil Rights Office at Requests should be made as early as possible to ensure the State has an opportunity to address the accommodation.

De acuerdo con el Título VI de la Ley de Derechos Civiles de 1964, la Ley de Estadounidenses con Discapacidades (ADA por sus siglas en inglés) y otras normas y leyes antidiscriminatorias, el Departamento de Transporte de Arizona (ADOT) no discrimina por motivos de raza, color, origen nacional, sexo, edad o discapacidad. Las personas que requieran asistencia (dentro de lo razonable) ya sea por el idioma o discapacidad deben ponerse en contacto con la Oficina de Derechos Civiles de ADOT en Las solicitudes deben hacerse lo más antes posible para asegurar que el Estado tenga la oportunidad de hacer los arreglos necesarios.