U.S. 1

This was the major Atlantic Coast route, terminating in the Florida Keys. Mainly superceded by Interstate 95.

Other pioneer route names associated include the Quebec-Miami International Highway, the Falls Line roads, the Capital Highway, and the Jefferson Davis Highway.

US Historic Route 1
U.S. 1: Fort Kent Maine to Key West, Florida (FHWA)

*Commercial sites with pop-ups

 

Books about US 1 include:
Peter Genovese’s 1999 The Great American Road Trip: U.S. 1, Maine to Florida
Andrew Malcolm and Roger Straus III’s 1991 U.S. 1: America’s Original Main Street

US 101 is not a daughter route, but a major western US route in its own right.

Maps of Route 1 Daughter Route Map