Official website of the MBTA -- schedules, maps, and fare information for Greater Boston's public transportation system, including subway, commuter rail, bus routes, and boat lines.
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T releases its schedule for the Thursday, March 26 Brazil vs. France friendly, which is the service tune-up for the real World Cup transit strategy.
As expected, running that much extra service proves to be a bloodbath for regularly-scheduled southside service because of all the vultured trainsets and an oversaturated Franklin-Fairmount mainline. Sucks bigtime to be a Fairmount, Forge Park, or Foxboro (regular-service schedule) rider that day. 60-90 minute Fairmount frequencies and no Readville Station service after 12:00pm, no regular Foxboro service meaning the inner Franklin Line gets decimated, 5 canceled Forge Park trains. If that's just for the tune-up, it's only going to be worse for the real World Cup where most of the Gillette games are scheduled for weekdays.
EDIT: All this disruption is only for 4 Gillette trains. In the real World Cup it'll be 14 to spread the damage that much more widespread. The gains to event ridership can't possibly come close to offsetting the ridership losses from disruption to other commutes.