Home / News / Mid-Coast Trolley Construction to Require Overnight Closures of I-5 Over the Next Two Weeks

Mid-Coast Trolley Construction to Require Overnight Closures of I-5 Over the Next Two Weeks

San Diego CA— Beginning tonight, Sunday May 20, and running through May 30, there will be five overnight closures of either the northbound or southbound lanes of Interstate 5 due to the construction of the Mid-Coast Trolley for the future extension of the Blue Line.

The closures were originally scheduled to begin in late April and continue through early May but were postponed.

A support column for a future Trolley bridge that will cross I-5 will be built in the center divider just south of Nobel Drive.

Heavy equipment and machinery will be located on the freeway during the closures. Over the five-night operation, an 8.5-foot diameter hole will be drilled in the center divider. Large cranes will hoist a 155-foot-long rebar cage from the freeway and settle it into the bored hole. More than 30 concrete trucks will be staged along the freeway to place the concrete for the column.

Northbound I-5 will be closed from State Route 52 to La Jolla Village Drive:

  • Sunday, May 20, from 9:30 p.m. to Monday, May 21, at 5 a.m.
  • Monday, May 21, from 9:30 p.m. to Tuesday, May 22, at 5 a.m.

Northbound motorists will be detoured via State Route 52.

Southbound I-5 will be closed from the Interstate 805 merge to Gilman Drive:

  • Tuesday, May 22, from 9:30 p.m. to Wednesday, May 23, at 5 a.m.
  • Thursday, May 24, from 9:30 p.m. to Friday, May 25, at 5 a.m.
  • Tuesday, May 29, from 9:30 p.m. to Wednesday, May 30 at 5 a.m.

Southbound motorists will be detoured via I-805.

Due to the large operation, there will be times when lanes on the open sections of I-5 will be closed in order to accommodate the heavy equipment that will be operating in the center divider.

Traffic controls and detour signs have been placed to alert motorists in advance.

Nearby residents may hear back-up alarms, drilling, and concrete pumping noises.

The Mid-Coast Trolley project will extend Blue Line Trolley service 11 miles north from the Old Town Transit Center to the University City community, serving major activity centers such as Mission Bay Park, the VA Medical Center, UC San Diego, and Westfield University Town Center mall. Mid-Coast Trolley construction began in fall 2016 and service is anticipated to begin in fall 2021.  The current budget is $2.1 billion, which includes financing costs. The project is funded through the TransNet half-cent sales tax and the Federal Transit Administration.