 The Boston Post Road, between what then the relatively small City of New York and Boston, began as a path to deliver the post using post riders (the first ride to lay out the Upper Post Road starting January 22, 1673), and developed into a wagon, or stage road in later colonial times.During the 19th century, pieces of the road were taken over and improved by turnpike companies.In the 1910s and 1920s, the Lower Post Road alignment (and realignments made to the route) was a National Auto Trail known as the Boston Post Road.