Map of Route 4/Route 403 ramps and exits (Map). Cartography by RIDOT Geographic Information Systems. Rhode Island Department of Transportation. Archived from the original on September 27, 2011. Retrieved July 10, 2009.
web.archive.org
Map of Route 4/Route 403 ramps and exits (Map). Cartography by RIDOT Geographic Information Systems. Rhode Island Department of Transportation. Archived from the original on September 27, 2011. Retrieved July 10, 2009.