Transportation Studies

Interstate 17: Indian School Road Traffic Interchange Study

The Arizona Department of Transportation, in cooperation with MAG, has initiated a study to evaluate potential capacity improvements at the Interstate 17 and Indian School Road traffic interchange in Phoenix. The interchange was identified as a candidate for capacity improvements in the Maricopa Association of Government (MAG) Interstate 10/Interstate 17 Corridor Master Plan (also known as the Spine Study), which was finalized by MAG in 2017. The latest information about the Spine Study is available on MAG’s website, keyword “Spine Study.” Funding for design, right-of-way acquisition, utility relocations and construction of the interchange project is included in fiscal year 2020 of ADOT’s current Five-Year Transportation Facilities Construction Program.

The major reason this project is needed:

Traffic congestion levels will continue to increase and are expected to reach unacceptable levels by the Year 2040.

ADOT is studying the no-build and two build alternatives as described below:

  • No-build option: No action is taken and the intersection remains in its current state.
  • Three-Level (or Platform) Diamond Interchange: Would create a third (top) level to accommodate two undisturbed through lanes for eastbound and westbound traffic on Indian School Road across the interchange. I-17 ramp intersections and turning traffic would occupy the middle (ground) level, and the lowest level would remain as I-17.
  • Other Viable Alternative: To be determined
Anticipated Project Timeline
  • Study Phase: Spring 2018 through spring 2019
  • Design Phase: Summer 2019 through summer 2020

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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.