The trooper, a K-9 officer, had his dog in the car, but the dog was not injured, according to FOX 25. The trooper had been working a construction detail, according to WHDH-TV.
The crash occurred around 4 a.m., according to WBZ-TV.
An elderly man was driving the car that struck the trooper. That man was taken to the hospital. The accident is under investigation.