segment of Route 2. After this interchange, Route 31 becomes a city street, having shared roadway with Route 2A and a wrong-way concurrency with Route 12. It then passes through downtown Fitchburg. As it leaves Fitchburg it is called Ashby State Road. In Ashby, it connects with Route 119 before reaching the New Hampshire state border, where it becomes New Hampshire Route 31. The stretch of Route 31 from Paxton Center to Holden Center is named the Chief Robert J. Mortell Memorial Highway, after Paxton chief of police Robert Mortell, who was killed in the line of duty on February 1, 1994, in the deeply wooded area bordering Route 31. Major intersections References External links Mass. Rt. 31 endpoint photos 031