A four mile stretch of State Route 99 (SR-99) in Stockton is scheduled to be widened starting this spring. The $214 million South Stockton Widening Project will expand the highway from four to six lanes from SR-4 to Arch Road.
“Caltrans improves mobility,” said Caltrans District 10 Director Carrie Bowen. “When this project is complete motorists will see improved mobility in South Stockton. That means less congestion, improved commute and a highway built to sustain traffic for the next 30 years.”
The project will be constructed in four phases.
Stage I will construct a new interchange at Golden Gate Avenue, and replace the railroad structure. The majority of the mainline widening will take place during this stage.
Stage II will reconstruct the partial interchange at Dr. Martin Luther King Jr. Boulevard to allow for two-way traffic Stage III will reconstruct the Main Street Over crossing to widen the freeway underneath.
Stage IV will replace the current partial interchange at Mariposa Road with a full service interchange allowing access from all directions. Mariposa Road will be closed for at least six months during Stage IV, which is scheduled to begin in 2014. A detour will be provided for both eastbound
Caltrans evaluated leaving Mariposa Road open during construction, “but the full closure is safer for motorists and workers, and allows us to complete the work in six months as opposed to one and one-half years,” said Project Manager Joy Pinne.
Funding includes $132 million from Proposition 1B, $34 million from state and local funds, and $48 million from Measure K. The project was awarded to Myers and Sons in December.
The project is part of a long term plan by Caltrans and its local partners to widen a 14 mile stretch of SR-99 from Hammer Lane to Austin Road.