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Mid-Coast Trolley Crews Complete Largest Concrete Pour ahead of Schedule

November 19, 2019 -- On Monday night the Mid-Coast Trolley project reached a significant milestone when crews conducted the largest concrete pour of the project to date.

Six hundred fifty cubic yards of concrete were used to form the 670-foot-long deck of the future Trolley freeway overcrossing south of Nobel Drive, one of two points where the Trolley crosses Interstate 5 (I-5).

The work required a full freeway closure of northbound I-5 and lane reductions on southbound I-5. Crews worked steadily through the night to complete the pour ahead of schedule, allowing the freeway to reopen hours earlier than expected.

“This work represents a monumental step forward on the largest project in the history of our region,” said SANDAG Chair and Mayor of Poway Steve Vaus. “We are proud of the men and women who have worked tirelessly on the Mid-Coast Trolley project, and are grateful to the community for the support and patience while we finish this work.”

Monday night’s work over I-5 was the final concrete deck pour along the elevated Trolley guideway that runs through the La Jolla and University community areas. The remaining concrete pours on the project will be much smaller in scale.

The Mid-Coast Trolley project represents a $2.17 billion investment to expand the regional transit network. Funding for the project is made possible with funds from TransNet, the half-cent sales tax dedicated to transportation projects. Transnet will fund 52 percent of the project, with the remaining funding being provided by a grant from the Federal Transit Administration. 


The Mid-Coast Trolley project will extend UC San Diego Blue Line Trolley service from Downtown San Diego to the University community, serving major activity centers such as Mission Bay, the VA Medical Center, UC San Diego, and University Towne Centre. Nine new stations will be constructed. Major construction work began in 2016, with service anticipated to begin in late 2021.

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For media inquiries, please contact the SANDAG Public Information Office at (619) 699-1950 or