Yet another "only on the MBTA" experience.
I happen to live an Uber ride from the Medford/Tufts new Green Line extension, and needed to get to North Station, so decided to give it a try. Inbound, the end-of-the-line station was clean and easy to use, with convenient elevators for a luggaged traveller. The train came quickly and zoomed into town adjacent to the Purple/Amtrak tracks. Nice ride. When we approached North Station, I was aware that they were providing shuttle service to Government center due to a construction project. As we entered the underground station, there were literally about eight MBTA personnel in safety vests placing and removing traffic cones from the tracks. We had to wait a few minutes until they got radio clearance, the cone was removed, and we were signalled with a traditional lantern up-and-down to proceed. I thought this was a bit odd but didn't really affect us.
It was the return trip where it got strange. Still no service south of North Station. I found the platform, and there was a very helpful if tired and frazzled MBTA employee giving directions. He said he had been on duty over 13 hours, but was hanging in there. There was only one track available, and northbound from North Station there are only two options, Medford/Tufts or Union Square. The switch is just beyond the Lechmere station. A train pulled in and unloaded everyone, and the advice guy tried to direct them to the shuttle. Now it really got weird. It seemed that the driver, now located at the northbound end of the train, could not determine or find out if he was going to Medford/Tufts or to Union Square. They told him they would let him know at Lechmere. So he and the advice guy loaded everyone onto the train, and we pulled out, taking our chances. At Lechmere, he announced that we were in fact going to Medford/Tufts, and that Union Square passengers should get off and wait for the next train. I don't think I've ever been on a train/subway/trolley where not even the driver knew where he was going.
He and I chatted a bit on the way to Medford/Tufts, and he said that they had not installed signalling for leaving North Station northbound from the southbound track, hence all the manual signals. And he said that all day he had no clue where the train was going when he left North Station. Heck of a way to run a railroad!