How Boston's Transit Crisis Got This Bad: A Decade of Deferred Maintenance and Political Half-Measures

The Green Line Extension opened to Medford in late 2022, four years behind schedule and roughly $1 billion over its original budget. That project — long celebrated as a victory for environmental justice advocates in Somerville and Medford — has become something of a shorthand for everything complicated about building transit infrastructure in Greater Boston. The trains run. The costs were staggering. And the core system that riders depend on every single day is still crumbling beneath their feet.

This Fourth of July weekend, with construction crews working overnight shifts on the Orange Line between Back Bay and Forest Hills, it's worth understanding exactly how Boston arrived at this point. The answer requires going back further than most politicians prefer to admit.

Decades of Debt, Decades of Delay

The MBTA's structural debt problem dates to Beacon Hill's 2000 reorganization of the agency, when the commonwealth transferred approximately $3.3 billion in Big Dig debt onto the T's books. That single legislative decision — defended at the time as a way to keep state finances cleaner — saddled the agency with debt service payments that consumed close to a third of its operating budget for years afterward. By fiscal year 2019, the T was spending more than $400 million annually just on debt payments, money that could not go toward replacing the ancient Red Line cars that regularly failed on the Longfellow Bridge or fixing the signal systems on the Blue Line that date to the Eisenhower administration.

The Federal Transit Administration put the MBTA under a Special Directive in 2022 following a string of serious safety incidents, including a Red Line derailment near JFK/UMass station and a Green Line collision that injured passengers near Government Center. The directive forced service reductions and speed restrictions across multiple lines and gave the agency until the end of 2023 to demonstrate measurable safety improvements. That federal intervention — unprecedented in scope for any American transit agency — forced a reckoning that years of internal reports and advocacy had failed to produce.

Meanwhile, the physical infrastructure tells its own story. The Orange Line fleet now running between Oak Grove and Forest Hills is composed of cars delivered starting in 2019, replacements for vehicles that had been in service since 1981. The Red Line is still waiting on car deliveries from CRRC, the Chinese manufacturer whose contract has been plagued by delays. As of June 2026, roughly 40 percent of the promised Red Line cars remain undelivered, more than two years past the contractual deadline.

Wu's Agenda Meets the Weight of History

Mayor Michelle Wu came into office in November 2021 on promises that included fare-free bus service and aggressive transit investment. The city launched fare-free pilots on the Route 28 bus — running from Mattapan Square through Roxbury — and Routes 23 and 29, producing ridership increases of between 20 and 30 percent on those corridors. The pilots were extended and eventually made permanent for those routes, funded through a mix of federal American Rescue Plan dollars and city budget allocations totaling roughly $8 million annually.

But bus fare policy and system-wide capital investment are different categories of problem. The T's capital spending plan, approved for fiscal years 2024 through 2028, totals approximately $8.9 billion — a figure that sounds large until you realize the agency's internal estimates put its deferred maintenance backlog at more than $10 billion. The Washington Street corridor through Roxbury, the Blue Line stations in East Boston, the commuter rail platforms at South Station: all of them carry deferred work measured in hundreds of millions of dollars.

The political will has shifted. Both Beacon Hill and City Hall now speak more urgently about transit reliability than they did a decade ago. Governor Healey's administration pushed through an MBTA funding package in 2024 that increased state contributions and reformed the board's governance structure. Whether that governance shift translates into faster contract execution and fewer cost overruns is what riders on the Orange Line platform at Downtown Crossing will be watching closely when the summer construction season wraps up in September.