Green Line (San Diego Trolley)

Green Line (San Diego Trolley)
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Name	Green Line
Caption	A San Diego Trolley car on the Green Line at Santee's Prospect Avenue station
Type	Light rail
System	San Diego Trolley
Status	Operating
Locale	San Diego, San Diego County, California
Start	Santee
End	Downtown San Diego
Stations	27
Opened	2005
Owner	Metropolitan Transit System (San Diego County)
Operator	San Diego Trolley, Inc.
Stock	SD100, S70, S200
Electrification	Overhead catenary
Website	Metropolitan Transit System

Green Line (San Diego Trolley) is a light rail line of the San Diego Trolley network serving San Diego County in California. Operated by San Diego Trolley, Inc. under the authority of the Metropolitan Transit System (San Diego County), the line connects eastern suburbs and the Mission Valley corridor with Downtown San Diego and regional transit hubs. The Green Line integrates with the Blue Line (San Diego Trolley), Orange Line (San Diego Trolley), UC San Diego, San Diego State University transit corridors and major intermodal connections.

Overview

The Green Line was created to provide a cross-county connection linking Santee, El Cajon, Mission Gorge, Mission Valley, Old Town San Diego, Mission Bay, and Downtown San Diego with transfers to Amtrak at Santa Fe Depot, COASTER at Santa Fe Depot and Old Town Transit Center, and regional buses operated by North County Transit District. The service supports access to institutions such as Petco Park, San Diego International Airport (via connecting shuttle proposals), Qualcomm Stadium's former site redevelopment, and medical centers including Sharp Memorial Hospital and UC San Diego Health. The line runs predominantly on dedicated right-of-way with signal priority at intersections and operates as part of the broader San Diego Metropolitan Transit System strategy for transit-oriented development near station areas.

Route and stations

The Green Line runs from eastern terminus stations in Santee through El Cajon before descending into Mission Valley and traversing the San Diego River corridor into central San Diego. Major stations include Santee Town Center, Grossmont Transit Center, Alvarado Medical Center-adjacent stops, Mission Valley Center, Old Town Transit Center, Mission San Diego de Alcalá-area stops, Santa Fe Depot, and central business district stops near Gaslamp Quarter and Convention Center. The route interchanges with the Blue Line (San Diego Trolley) at Santa Fe Depot and the Orange Line (San Diego Trolley) at 19th Street. Stations feature ADA accessibility compliant platforms, park-and-ride facilities, bicycle lockers, and connections to MTS Rapid bus lines and Amtrak services. Several stations abut or serve redevelopment sites such as the Midway District and the Civic Center complex.

History and development

Planning for a diagonal east–west trolley connection dates to corridor studies in the late 20th century that involved the San Diego Association of Governments and regional transit stakeholders like the Santee Community Planning Group and the City of San Diego. Construction of the Green Line was a component of the Trolley Renewal Project and the Mission Valley East extension, which opened in phases in 2005. The project reused rights-of-way once used by freight operations and required coordination with agencies such as the California Department of Transportation, Federal Transit Administration, and local jurisdictions including La Mesa and Santee. Environmental review processes referenced the National Environmental Policy Act and the California Environmental Quality Act, and the alignment prompted transit-oriented development proposals near stations in Grantville and Tierrasanta. Subsequent service changes realigned the Green Line to serve the University of San Diego area and to improve operational connectivity with the Blue Line (San Diego Trolley) and UC San Diego-oriented services.

Operations and rolling stock

Service is provided by San Diego Trolley, Inc. under contract to the Metropolitan Transit System (San Diego County), using Siemens SD100, Siemens S70, and Siemens S200 light rail vehicles. The fleet operates on standard gauge track with overhead catenary power and employs Positive Train Control elements integrated under regional safety programs coordinated with the Federal Railroad Administration. Operating hours and headways vary by peak demand with intensive service during events at Petco Park and regional conventions at the San Diego Convention Center. Maintenance and storage are handled at the MTS Rail Yard facilities in Santee and Mission Valley, with periodic mid-life overhauls coordinated with manufacturers and suppliers such as Siemens Mobility.

Ridership and performance

Ridership metrics for the Green Line reflect commuter flows between eastern suburbs and Downtown San Diego as well as event-driven peaks. Annual and weekday ridership figures are collected by the Metropolitan Transit System (San Diego County) and reported alongside system-wide performance indicators used by the Federal Transit Administration. Key performance measures include on-time performance, mean distance between failures for rolling stock, and passenger load factors during peak intervals. The Green Line has contributed to regional mode shift objectives identified by the San Diego Association of Governments, and station-area developments have been evaluated for transit ridership elasticity and first-mile/last-mile connectivity with Bikeshare and local bus services.

Future plans and expansions

Planning documents from the Metropolitan Transit System (San Diego County) and the San Diego Association of Governments have proposed extensions, service frequency increases, and infrastructure upgrades for the Green Line corridor. Concepts include enhanced intermodal access to San Diego International Airport, additional infill stations in Mission Valley West, and signaling improvements consistent with federal grant programs administered by the Federal Transit Administration. Long-range scenarios explore coordination with regional projects like Mid-Coast Trolley extension lessons and potential procurement of next-generation light rail vehicles to replace aging Siemens SD100 units. Community planning groups and elected officials from San Diego City Council districts continue to engage in corridor planning and funding discussions.

Category:San Diego Trolley lines Category:Light rail in California