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Budget extra time with Southern closing at 59th Ave. for interchange work

Baseline, Broadway open through South Mountain Freeway work zone
November 24, 2017

PHOENIX – Motorists who normally use Southern Avenue at 59th Avenue need to plan ahead and allow extra travel time as the Arizona Department of Transportation starts construction Monday, Nov. 27, on a Loop 202 South Mountain Freeway interchange in Laveen.

Southern Ave Detour MapSouthern Avenue will be closed at 59th Avenue through March so crews can build the southern half of one of the 22-mile freeway’s 13 interchanges.

Baseline and Broadway roads are among options for east-west travel between 51st and 67th avenues. Heavier-than-normal traffic is expected on alternate routes during this extended closure.

The full closure of Southern Avenue at 59th Avenue will allow crews to install drainage structures and relocate utilities, which require open trenches across the full width of the roadway.

Southern Avenue will be widened to complete the interchange in two phases. Paving in the first phase will allow crews to complete the northern half of the interchange without a second extended closure.

Local traffic and access to nearby schools and businesses will be maintained at all times.

In order to build the interchange, crews will complete the following work:

  • Perform earthwork needed for the freeway and connecting ramps
  • Begin construction of a 125-foot bridge over Southern Avenue
  • Install underground utilities and drainage structures
  • Pave the eastbound Southern Avenue lanes

After the Southern Avenue closure is lifted, additional work will include paving the ramps and mainline freeway, installing signage, constructing retaining walls, finishing construction of the Southern Avenue bridge, completing final striping and adding landscaping.

The South Mountain Freeway, which is scheduled to open in late 2019, will provide a long-planned direct link between the East Valley and West Valley and a much-needed alternative to I-10 through downtown Phoenix. Approved by Maricopa County voters in 1985 and again in 2004 as part of a comprehensive regional transportation plan, the South Mountain Freeway will complete the Loop 202 and Loop 101 freeway system in the Valley.

Real-time highway conditions are available on ADOT’s Arizona Traveler Information site at, by calling 511 and through ADOT’s Twitter feed, @ArizonaDOT. When a freeway closure or other major traffic event occurs, our free app available at will send critical information directly to app users in affected areas – where possible, in advance of alternate routes.

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.