You don't need a conductor at every door to allow all door embarking/disembarking. Look at metro north, or SunRail. They both allow all door boarding without a

You don't need a conductor at every door to allow all door embarking/disembarking. Look at metro north, or SunRail. They both allow all door boarding without a conductor at each door. Raised platforms is something that could help to achieve process improvement.