Transit officials in Massachusetts say plans to upgrade Green Line subway cars will cost more and take longer than expected.
The Boston Globe reports the Massachusetts Bay Transportation now projects the $104 million project will take until the end of 2017 and cost about $11.5 million more.
Officials say asbestos removal and other technical complications are to blame, but the transit workers' union suggests the state's contractor has simply been doing subpar work, the Globe reports.
An initial batch of refurbished trains rolled out last year and 86 more were expected to be in operation by the end of 2016.
All of the trains date to the 1980s and many suffer from water damage and corrosion. The Green Line is the nation's oldest subway line.