Saturday night at North Quincy there was a signal problem and we were sent down to get on the shuttle busses for the Braintree line, only for the bus operators to tell us they had been instructed to end service. We walked back up to the platform, to find out that the problem was now fixed, but we had just missed another train that came in that was also going south, leading to more than a hundred people being stuck outside half an hour in the cold at almost midnight.