I'd like to take the Megabus to NYC from Philadelphia. Concerning traffic... there will always be comparable high traffic in the metro area. However, I thought, the peak hours to drive into Manhattan with a bus, would be the worst in the time between 8-9 am. If I would take the bus departing at 8 am in Philadelphia, I would probably arrive after 9 am in the metro area, thus avoiding the most of the bad traffic?
Best, Stephan