we’ve traveled east to Frostburg Maryland - but ran out of time and did not take the switchbacks up into Frostburg and had to return
Those switchbacks only get you to the train station and hostel/campground. You then have to take the steep road to get to the main drag. It was very busy in the afternoon with, among other traffic, school buses. I camped, so I could walk a (steep) back way from the campground.
Once you get to the main drag, a lot of business are down a steep hill.