PHOENIX – The Arizona Department of Transportation is advising motorists who use the Interstate 10/Houghton Road interchange in Tucson to expect overnight delays for about two weeks starting Monday, December 14, as crews place girders for the new Houghton Road bridge.
During the work, I-10 traffic will be routed up and over the entrance and exit ramps while crews place the girders above one direction of the highway at a time. The 26 concrete girders, which are 120 feet long and weigh 55 tons each, are lifted off truck beds and hoisted into place with a crane.
Motorists should plan for delays during the work, which is scheduled between 9:30 p.m. and 5:30 a.m. each night. The work will require rerouting one direction of Interstate 10 at a time. Houghton Road will remain open, with delays of about 15 minutes near the ramps.
During the work, drivers should consider alternate routes that include Rita Road and Colossal Cave/Wentworth Road.
The work is part of a $24.4 million project to replace the two-lane Houghton Road bridge with a new diverging diamond interchange that features a six-lane bridge across I-10. The project began in August and is expected to be completed in late 2021.