A single-vehicle crash on the westbound side of the Mass. Pike in Westfield caused heavy traffic on Monday afternoon.

Can the police police themselves? The first outsider to lead the Massachusetts State Police is promising reform.

Mass State Police Trooper Sean Clark was conducting a traffic stop at around 2:20 a.m. when a 32-year-old woman allegedly struck him with her vehicle on the side of I-90 west in Chicopee.

The intersection of Revere Beach Boulevard and Shirley Avenue in Revere, Mass., the area where a Mass. State Police trooper was hit by a motorcycle. (Google Maps) ...