Interstate 10: Houghton Road Traffic Interchange

The Interstate 10: Houghton Road traffic interchange will be reconstructed to improve traffic operations.

Key elements of the project:

  • Construct a new, wider Houghton Road bridge over I-10 just west of the existing bridge
  • Widen Houghton Road to three lanes in each direction through the new interchange
  • Reconfigure the interchange as a Diverging Diamond Interchange (DDI)
  • Realign Rocket Road on the north side of the interchange
  • Improve accessibility for bicycles and pedestrians

The project will connect to the new improvements north of I-10 being constructed by the city of Tucson. Work is tentatively scheduled to begin in the first half of 2020. Work will be staged to keep the existing Houghton Road bridge and ramps open to the greatest extent possible.

Business access will be maintained throughout the project.


2019 – Final design completed

2020 to 2022 – Construction


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.

Considerable growth is anticipated along the Interstate 10 (I-10) corridor in the coming years, with projections indicating volumes will increase by 50% by 2045. Similarly, Houghton Road expects substantial increases in traffic, with projections showing a 500% increase north of I-10 and 200% increase south of I-10. The reconstructed interchange will provide relief for motorists accessing existing and planned residential and business developments in the surrounding areas.

The Design Concept Report was completed in April of 2018.

Stay Informed

Schedules are subject to change based on weather and other unforeseen factors. Subscribe to receive project updates and traffic alerts by email. For more information, please call the ADOT Bilingual Project Information Line at 855.712.8530 or submit a question or comment by email.  For real-time highway conditions statewide, visit ADOT’s Traveler Information Site at, follow ADOT on Twitter (@ArizonaDOT) or call 511, except while driving.