 From there, maps show a route through Chelmsford along North Road and Princeton Street into what is now North Chelmsford's Vinal Square, then along Tyngsboro Road through North Chelmsford and Middlesex Road through Tyngsboro to Nashua, New Hampshire.It was about in length, with four (4) toll gates along the way.As was the practice of that time, the road was as straight as possible, and thus missed the advantages of passing through economic centers along the way.