Work begins on Mid-Coast Trolley tunnel underpass in San Diego

March 12, 2019

Major construction will continue on the underpass beneath La Jolla Colony Drive through late 2019

On Tuesday, March 12, La Jolla Colony Drive in San Diego will be closed for preparations associated with the construction of a Mid-Coast Trolley underpass. 

This underpass will allow the Trolley to pass under La Jolla Colony Drive as it travels along the eastern side of I-5. The future Trolley underpass will look similar to 70th Street, used by the Trolley Green Line.

The San Diego Association of Governments (SANDAG) is heading up the underpass project, and major construction is scheduled to begin on Monday, March 18. Due to the complexities of this construction, work is expected to continue through late 2019.

During construction, La Jolla Colony Drive will provide one lane of northbound and southbound travel. La Jolla Colony Drive is scheduled to be reconfigured on Sunday, March 24. At that time, southbound lanes will be closed, and northbound lanes will be re-striped to allow one lane of travel in each direction.

Occasional full weeknight and weekend closures may be required during construction. During closures, there will be no access to La Jolla Colony Drive from east of the I-5 on- and off-ramps to Rosenda Court. Closures are currently scheduled to take place Tuesday, March 12, through Thursday, March 14, and Monday, March 18, to Thursday, March 21, from 9 p.m. to 5 a.m. each night.

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


Source: SANDAG