many interstate routes by 1927. By 1927, Route 8 in Vermont took a different course than that established in 1922. From the Massachusetts line, the route made its way along modern Route 8 to Heartwellville, then along modern Route 100 and Boyd Hill Road to Wilmington. An additional segment from Rawsonville to Londonderry is also cited in the 1927 US Bureau of Public Roads study, though its relation during this time to the former route is unclear. In later USGS topo maps, this gap was bridged by modern Route 100. [ { "type": "ExternalData", "service": "page", "title": "New England Road Marking System/Vermont Routes.map" }, { "type": "ExternalData", "service": "page", "title": "New England Road Marking System/Vermont Interstate Routes.map", "properties": { "stroke": "#0000ff", "stroke-width": 5 } } ] References State highways in Connecticut State highways in Maine Numbered routes in Massachusetts State highways in New Hampshire Numbered routes in Rhode Island State highways in Vermont Lists of roads in the United States