They've been workin' on the railroad at Central. Photo by MBTA.
UPDATE: The T reports service resumed around 2:10 p.m., with, of course, residual delays.
Ruddy S. reports a broken rail. The T says it's now busing between Kendall and Harvard.
Dani B., who took the photo below, tweets:
One lousy bus waiting for us at Kendall #shocker