Maryland Purple Line Tests 2.5-Mile Bethesda Segment

BETHESDA, Md. – The Maryland Transit Administration (MTA) began live-wire testing of new Purple Line light-rail vehicles on a 2.5-mile segment between the Lyttonsville Operations and Maintenance Facility and Bethesda Station in July 2026, marking the fourth of seven test segments on the 16-mile corridor. Construction of the long-delayed transit project is 90% complete, with all 16 miles of track and 1,187 overhead wire poles installed, and revenue service is targeted for late 2027.

What Is the Full Scope of This Project?

The Purple Line will connect Prince George’s and Montgomery counties with 21 stations across 16 miles of dedicated light-rail track. The line will provide transfers to Washington Metropolitan Area Transportation Authority (WMATA) Metrorail, Maryland Area Regional Commuter (MARC) trains, and Amtrak, creating a circumferential transit link around Washington, D.C. The current live-wire test evaluates track integrity, overhead catenary, and vehicle electrical systems along the 2.5-mile segment from the Lyttonsville operations and maintenance facility to the Bethesda station, which is the fourth of seven testing sections.

Key Project Data

How Does This Compare to Similar Projects?

The Purple Line’s cost escalation from $5.6 billion to nearly $10 billion places it among the most expensive light-rail projects per mile in the U.S. For comparison, the Los Angeles Crenshaw/LAX light-rail extension cost $2.1 billion for 8.5 miles ($247 million per mile) (Source: Los Angeles County Metropolitan Transportation Authority, 2021), while the Purple Line’s 16-mile alignment is projected at roughly $619 million per mile. The original public-private partnership contract with Purple Line Transit Partners was terminated due to cost overruns, leading to a $250 million settlement, and additional utility relocation delays resulted in $563 million in extra payments to the replacement contractor, Maryland Transit Solutions, in 2023 and 2024. These figures contrast with the global urban rail investment surge—commuter mobility improved 18% as metropolitan congestion intensified—though North America accounted for only 11% of rail modernization demand in 2025 (Source: Business Research Insights, 2025).

Editor’s Analysis

The start of live-wire testing is a tangible milestone for a project that has become a cautionary tale of cost overruns in U.S. light-rail public-private partnerships. The budget near-doubling and multi-year delays, while extreme, mirror the challenges other North American transit megaprojects face amid supply-chain and labor constraints. If service launches in late 2027 as now targeted, the Purple Line could still demonstrate the value of circumferential rail links in large metropolitan regions, but the financial legacy will likely prompt more rigorous fiscal oversight for future P3 transit procurements.

FAQ

Q: When will the Purple Line open for passenger service?
A: Revenue service is expected to begin in late 2027. The project is 90% complete with all track and overhead wire poles installed, though previous deadlines were repeatedly pushed back.

Q: What is the total cost of the Purple Line?
A: The budget has risen from an initial $5.6 billion to nearly $10 billion in 2024. The increase includes a $250 million settlement with the original contractor and $563 million in additional payments for utility relocation delays.

Q: Which segment is being tested first?
A: The 2.5-mile segment between the Lyttonsville Operations and Maintenance Facility and Bethesda Station is the fourth of seven test segments to receive live-wire testing; three other segments completed testing earlier in 2026.