Traveling to IAD for morning flight on Friday, Nov. 9. Coming from Hagerstown, Md. area. What is the best way to get to IAD arriving in the area between 6:30 - 7:30 am (9:30 am flight). I understand there is a toll road, but also a Dulles access road? Is this rush hour time for a Friday morning? Please advise. Thank you for your help.