From the Buck's County Courier Times by Brian Scheid.
Us Route 1 is very congested in Bucks County (near Philadelphia). You can go from Canada to Key West, Florida, on this road.
The original path of US-1 in Bucks County can be traced all the way back to 1793
The northern part of it goes through New York City with a population of 8.2 million to Littleton, Maine, with a population of 971.
It hugs the east coast and passes through nearly every major coastal city. It has twists and turns and sometimes is just a two-lane highway and at others a four lane expressway.
Bucks County has 14 miles of US-1/