Editor's Note: This is an excerpt from WBUR's daily morning newsletter, WBUR Today. If you like what you read and want it in your inbox, sign up here. A flash flood warning is in effect for some areas ...
A delay on the MBTA because of a "signal problem" is a regular occurrence. But for many MBTA riders, what that means is a mystery. Simply put, the signal system is "the intelligence that helps trains ...
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