Construction Notices

Mid-Coast Trolley construction began in fall 2016. To find out more about the construction process, check out our Construction Info brochure in English and en Español.  

Current Activities

Northbound and Southbound I-5 Closures: On Sunday, December 3, and Sunday, December 10, while crews relocate existing utility lines, brief, intermittent traffic closures on northbound and southbound I-5 near Balboa Avenue will be necessary from 6 a.m. to 8:30 a.m. each day. A lane reduction on southbound I-5 will also be in place on these days between 3 a.m. and 10 a.m. The California Highway Patrol will be on site to monitor traffic flow. Please anticipate delays.

View additional information about these closures.

View map for more information.

La Jolla Colony Drive: As part of the Mid-Coast Trolley Project, San Diego Gas & Electric will be removing an existing, de-energized gas pipeline to make way for construction of the trolley tracks. To accommodate this work, closures of La Jolla Colony Drive from Rosenda Court to the I-5 La Jolla Colony Drive/Gilman Drive off-ramp will be in place November 13 to November 17 and November 19 to November 22, 9 p.m. to 5 a.m. nightly. Motorists and local residents will be detoured via Noble Drive.

View map for more information.

Morena Boulevard: A lane closure on northbound Morena Boulevard between Jutland Drive and Avati Drive is in place October 30, 2017, through late November 2017 while crews continue Mid-Coast project work in the area.

View map for more information.

Nobel Drive Sidewalk/Pedestrian Detour: The westbound Nobel Drive sidewalk from approximately University Center Lane to La Jolla Village Square Driveway will be closed for construction work beginning October 23, 2017. Please follow detour signs or use alternate routes. This pedestrian detour will be in place through spring 2018.

View map of pedestrian detour.

Genesee Avenue Road Widening: Work activities to widen Genesee Avenue from Regents Road to La Jolla Village Drive are ongoing. The work includes utility relocation, barrier installation, road re-striping, median and sidewalk demolition, and preparation to construct the viaduct - a bridge structure that will carry the Trolley down the middle of Genesee Avenue. Several different traffic control phases involving long-term lane closures and shifts will be ongoing as this work progresses on both northbound and southbound Genesee Avenue. Traffic control phasing and lane configuration may vary between day and night work hours. Traffic control signs, including necessary detours for motorists, pedestrians and bicyclists, will be posted. These types of traffic controls will be deployed at various times through early 2018.

View this week's scheduled closures.

View additional information on this road widening.

View map of pedestrian detours in this area.

Friars Road: Crews will be working along Friars Road, between Sea World Drive and Napa Street, to build the San Diego River Bridge Double Track project in advance of Mid-Coast Trolley project construction. Work began in fall 2016 and is expected to be complete in 2019. Throughout the course of the project, several traffic control phases involving multiple lane closures and shifts will be implemented along Friars Road to help facilitate this work.

View map for more information.

Tree Removal on Northbound I-5: In mid-September, crews will begin removing vegetation within the project area on the east side of northbound I-5 between La Jolla Colony Drive and Nobel Drive. Work is anticipated to continue through late 2017. Upon completion of project construction, trees and other types of vegetation will be replanted along I-5 where there is sufficient distance between the street and the new Trolley extension, as well as in other locations. For safety purposes, tree canopies when fully grown must be kept away from the overhead catenary lines associated with the new Trolley project. For this reason, trees cannot be replanted at all locations along I-5. 

View additional information on this construction activity.

Campus Point Drive: Campus Point Drive from Voigt Drive to Medical Center Drive will be closed 9 p.m. on Friday, September 15, through 5 a.m. on Monday, September 18, for installation of falsework, which is temporary framework used to support structures during construction. 

View map for more information.

Construction Staging Begins for Rose Creek Bikeway: To prepare for upcoming bikeway construction and staging, crews will begin clearing and removing vegetation in the general project area in mid-September. Other preparatory work, including removal of trailers at the corner of Mission Bay Drive and Damon Avenue will be scheduled for late August or early September. Major construction work related to the construction of the bikeway will begin in spring 2018.

View additional information.

Temporary Realignment of Rose Canyon Bike Path and I-5 Impacts: The existing Rose Canyon Bike Path will be temporarily closed during construction of the Trolley extension. Crews have constructed an interim bike path to reroute bicycle traffic around work zones. A realignment of the northern portion of the interim bike path is currently in place. This portion of the bike path reroutes to a protected, temporary two-lane bikeway located on the outside shoulder of the northbound I-5 off-ramp. The interim bike path realignment is anticipated to be in place through November 2018. After the work is completed near the realigned northern portion of the interim path, the alignment will be restored to the interim path that was opened in July 2016.

View additional information about realignment around interim bike path. 

View additional information about interim bike path.

Morena Boulevard Construction Activities: In March 2017, Mid-Coast Trolley construction crews began construction along Morena Boulevard from Clairemont Drive to Balboa Avenue. Initial activities include traffic barrier installation, vegetation removal, utility installation, and wall construction for the future light rail infrastructure. To accommodate this work, the southbound lane of Morena Boulevard closest to the railroad tracks (the furthest west lane) will be closed to traffic for the duration of the project. Additionally, various portions of Morena Boulevard between Balboa Avenue and Tecolote Road may be reduced to one lane in either direction throughout the life of the project. Additional truck traffic should be anticipated during this work. Specific locations for lane reductions will vary as crews make progress on the new trolley line. Road conditions will change throughout the construction process and motorists, cyclists, and pedestrians should use extra caution when traveling near the work area and remain aware of travel speed and road conditions. Work hours are Monday through Friday, 7 a.m. to 5 p.m., although intermittent weekend work will sometimes be required. Traffic controls will remain in place 24 hours a day. 

View additional information.

Gilman Drive Bike Lane Near Rose Canyon Bike Path: A portion of the bike lane on Gilman Drive, below the I-5 freeway overpass, will be intermittently closed for project construction access. Cyclists will still be able to access the Rose Canyon Bike Path. Please exercise extra caution when traveling near the work area. 

View additional information.

Vegetation Removal along West Side of I-5: On January 30, 2017, crews began preparation work to remove trees and shrubs from the Caltrans right-of-way next to the southbound lanes of I-5 (the west side of the freeway from the La Jolla Village Drive off-ramp to the Nobel Drive off-ramp) in the future path of the trolley project. This work will require traffic controls, including installation of temporary barricades along the west side of southbound I-5. The vegetation removal work is anticipated to last approximately two months. Upon completion of all construction activities required in support of the Mid-Coast Trolley project in this location, vegetation will be planted. 

View additional information.

Marian Bear Memorial Park: Crews have fenced off an area within the Rose Creek Channel, near the existing railroad tracks, for construction activities and staging equipment purposes. There will be no access along the Rose Creek channel between Marian Bear Memorial Park and Rose Creek open space. Users of the Marian Bear Park trail should avoid entering or passing through the construction area. Please follow direction of the posted signs.

Gilman Drive Bridge: Work began in late 2016 on I-5 near Gilman Drive to prepare for construction of the Gilman Drive Bridge. Crews have installed temporary barricades near Gilman Drive that will remain for approximately two years. The new bridge will connect the west and east sides of UC San Diego and span I-5.

View additional information on preparation for and construction of the Gilman Drive Bridge.

Friars Road: In fall 2016, crews began work along Friars Road between Sea World Drive and Napa Street to build the San Diego River Bridge Double Track project in advance of construction on the Mid Coast Trolley project. Several traffic control phases involving multiple lane closures and shifts will be implemented in this area throughout the course of the project to help facilitate this work. The concrete barrier railing that has been placed on Friars Road is to support both projects and also is expected to last throughout the project duration. 

View construction notice.

Balboa Avenue: Crews continue to work nights to minimize impacts to local traffic. For all residents and businesses in the area, access to driveways will be maintained throughout the project. There may be some portions of roads closed or detoured at night. 

View information on work occurring on Balboa Avenue.

Santa Fe Street: Crews are working day and night shifts to complete a water line installation. Traffic controls are currently in place. SDG&E began on a separate utility relocation project in the same area in June 2016 and will continue through winter 2016.

Genesee Avenue: Day work is ongoing at the intersection of Eastgate Mall, progressing north to Regents Road. Night work hours will be in effect, and some lane closures will be necessary to complete this utility work. View information on work occurring on Genesee Avenue.

Community Presentations


March 16: Irvine Company Construction Info Sessions

Display Boards | Presentation


November 9: University City Community Association

Display Boards

November 8: PS Rose Canyon 


October 22: Groundbreaking Event

Invitation | Display Boards

September 20: Clairemont Community Planning Group


August 18: Canyon Park Apartments Open House

Display Boards

July 26: Irvine Company Construction Info Sessions

Display Boards | Presentation

March 29: La Jolla Colony Open House

Display Boards

Stay Informed

To stay up-to-date on the Mid-Coast Trolley project, follow us on Twitter and like us on Facebooksign-up to receive our newsletter, or contact the project team with questions at or (877) 379-0110.