Northcentral District Projects

Interstate 17 and Interstate 40 Traffic Interchanges


The Arizona Department of Transportation and the Federal Highway Administration are performing bridge deck replacement and repair work on four Interstate 40 bridges that carry traffic over Interstate 17 and Beulah Boulevard within the city of Flagstaff in Coconino County. The purpose of the project is to replace three bridge decks and approach slabs, increase the bridge cross slopes, and retrofit one bridge deck with an overlay. The project will also include guardrail and paving work.

Construction is scheduled to begin in mid-February 2018 and is scheduled to be complete late 2018.

What to Expect:
  • Construction seven days a week with both day and night work, according to project phasing
  • Overnight, one-direction closures on Beulah Boulevard beneath I-40
  • Rolling night closures of I-17, according to phasing
  • Ramp closures
  • The southbound I-17 to eastbound I-40 ramp is scheduled to be closed in two-week increments at the end of June, end of July and end of October
  • The northbound I-17 to westbound I-40 ramp is closed through December

Drivers should follow posted detour route signage for access during closures.

Public Meetings:

ADOT is scheduled to host  informational sessions for  the public from 5:30 to 7 p.m. on April 9, May 8, June 12 and July 10. These open houses will be at ADOT’s facility at 1901 S. Milton Road in Flagstaff. Project team members will be available to provide information and answer questions on the construction schedule and traffic impacts.

For more information:

Contact Mackenzie Kirby, Community Relations project manager at or 928.525.6494. Please subscribe to receive project updates and traffic alerts by email.

ADOT Project Information Line: 855.712.8530

ADOT Project Number: 040 CN 195 H877501C

Federal Project Number: NHPP-040-C(216)T

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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.