This railroad bridge reads "Welcome to Spaghettiville". Lowell was the home of Prince Spaghetti, and this section was called "Spaghettiville." The privately-held company sold the business and name to Borden in 1987, who closed operations in 1997.
This bridge is notorious for its low height which skims the tops off trucks.
http://prince.newworldpasta.com/pasta_story.cfm
http://www.massmoments.com/moment.cfm?mid=207