Commuters might want to give themselves a little extra time to get the polls this evening, as a disabled Green line train, a disabled Silver line bus and bumper-to-bumper traffiic are mucking up the Tuesday afternoon commute in Boston.

A train off the Green line's D line backed up commuters for about two hours, causing minor slowdowns, according to alerts from the Massachusetts Bay Transportation Authority. Delays are a bit more severe for travelers depending on Silver line buses, after a bus broke down just before 4 p.m.

Red line riders traveling between the JFK/UMass and North Quincy stations should remember that shuttle buses will replace trains starting at 8:45 p.m., lasting through the end of service on Wednesday.

Traffic was slowing down service by five to 20 minutes on 22 MBTA bus routes as of 4:30 p.m.

Typical traffic is clogging Route 93 and the Mass Turnpike, but no major crashes were stopping drivers, according to the Massachusetts Department of Transportation's real-time traffic map.