Los Angeles Advances $3.1 Billion Metro D Line Subway Extension with Systems Testing and Station Commissioning

Transforming East-West Mobility Along Los Angeles' Busiest Corridor

LOS ANGELES, California — Marking a historic leap forward for public rapid transit across Southern California, the Los Angeles County Metropolitan Transportation Authority (LA Metro) has advanced into the critical system integration and pre-revenue commissioning phase for Section 1 of the $3.1 billion D Line (Purple Line) Subway Extension Project. Stretching 3.92 miles westward beneath the legendary Wilshire Boulevard corridor from the existing terminus at Wilshire/Western to the border of Beverly Hills at Wilshire/La Cienega, the megaproject establishes a subterranean transit spine designed to bypass the region's notorious surface street gridlock.

Once commissioned for full passenger revenue service, Section 1 will enable high-capacity heavy rail trains to travel from Downtown Los Angeles to the Miracle Mile in under 20 minutes, slashing commute times in half for tens of thousands of daily commuters and bridging long-separated commercial, cultural, and residential epicenters.

Engineering Milestones Across Three Landmark Underground Stations

Executed by joint venture prime contractor Skanska-Traylor-Shea (STS), heavy civil construction on Section 1 delivered twin 18.9-foot-diameter bored running tunnels utilizing advanced earth pressure balance tunnel boring machines. Civil engineering crews have successfully installed three monumental underground stations: Wilshire/La Brea, Wilshire/Fairfax (adjacent to the renowned Los Angeles County Museum of Art and the Academy Museum of Motion Pictures), and Wilshire/La Cienega.

Subterranean engineering teams are completing Local Field Acceptance Testing (LFAT), energizing traction power substations, and verifying automated Communications-Based Train Control (CBTC) signaling networks. Station interiors feature deep mezzanine concourses, full ADA compliance with redundant high-speed elevators, illuminated architectural canopy entrances, and state-of-the-art tunnel ventilation shafts built to withstand seismic events.

Foundational Segment of the 9-Mile Transit Connection to the Westside

Section 1 represents the initial phase of the complete nine-mile, $9.5 billion D Line Extension, which will eventually carry passengers all the way through Beverly Hills, Century City, and the university campus of UCLA to the Westwood/VA Hospital. With Sections 2 and 3 progressing toward planned operational handovers ahead of the 2028 Summer Olympic and Paralympic Games, the subway extension forms the centerpiece of LA Metro's 'Twenty-Eight by '28' infrastructure transit initiative.

Federal Transit Administration (FTA) Capital Investment Grants, complemented by Los Angeles County voter-approved Measure R and Measure M sales tax revenues, provide robust capital backing for the project. By taking an estimated tens of thousands of automobile trips off congested arterial boulevards each weekday, the D Line extension serves as an indispensable pillar of Southern California’s long-term climate action and mass transit decarbonization goals.

Transit-Oriented Density and Urban Reinvestment Along Wilshire Boulevard

Alongside heavy engineering, the City of Los Angeles Department of City Planning is coordinating Transit-Oriented Communities (TOC) zoning frameworks around each new station portal. These urban master plans incentivize mixed-income and affordable housing construction, active ground-floor retail plazas, and dedicated micro-mobility hubs for e-bikes and feeder bus lines.

Civic leaders and neighborhood business alliances emphasize that the D Line Extension redefines urban connectivity across Los Angeles, linking world-class museums, major hospitals, and bustling commercial districts through a dependable, rapid, zero-emission subterranean rail network for generations to come.