This might not be news for a lot of people, and of course, I've already known this news after I moved to Boston three months ago. It's just that recently I've really had enough of Green Line D.
I need to commute on weekdays, and D line always brings me a lot of troubles after they started their replacement project. First of all, Google map is not able to track every D line train due to the signal replacement. So you can never know how long you need to wait after you step out of your house. Secondly, I've already encountered two times that D line is stuck on rails with lights off. People on the train need to wait for 10-15 minutes for it to start to go again.
These issues might not be problems if you're not in a hurry, but it's really annoying when you're going to work. I am not quite sure how long it needs to take for D line to get these replacements done, but I just pray that everything can get back to the right track as soon as possible. My boss might also have had enough of me due to me being late.