New Hampshire Northcoast Gravel Train southbound in Rollinsford, NH. In about two hundred yards, the train will leave the NHN Rail Line (the old Boston & Maine RR Conway Branch) for the Pan Am Railways (Guilford Rail System, Boston & Maine Railroad) Main Line in Rollinsford, NH. In about three miles, the train will stop for a brief layover in Dover, NH. After a Crew change takes place and (usually) it is overtaken by a southbound Amtrak Downeaster, the train will proceed south to unload at the Boston Sand and Gravel facility in Charlestown, near Boston, MA. en.wikipedia.org