What is the busiest Amtrak route that does not stop at either Lortorn Station?
Lorton station (VRE):  Amtrak's "Northeast Regional", "Silver Meteor", "Silver Star", "Palmetto", and "Carolinian" trains share the line but do not stop at either Lorton station. Northeast Regional: The Northeast Regional is a higher-speed rail service operated by Amtrak in the Northeastern and Mid-Atlantic United States.
i don't know