by Swedish Meatball
Each train is crewed differently. Local trains will have more crew members because it would be difficult to walk through 6 cars with 2 people when your stops are 3 minutes apart. I know that the 6:04 train to New Haven is crewed by a Conductor and AC only with 8 or 9 cars. As far as opening up all the cars it would make no sense to open 10 cars with only 200 people on board. If there was any type of an emergency it would be difficult for 2 people to walk their train to get everyone off. Terminal Proceed should be able to chime in and give the number of people per car before they have to open more.