anna meiller has the story. >> reporter: this is the deadly collision that greg sanford was trying to prevent when he saw the drive of a red 495 south on thanksgiving morning. >> i was trying to do whatever i could to try and stop whatever it was. >> reporter: he turned his own car around, driving the wrong way to warn traffic. >> flashing lights so oncoming traffic could see the lights and react before something like that happened. >> reporter: troopers said that they were on the way and to turn around for his own safety. >> the original car was ow way. advised him to stop. >> reporter: moments later, police say the wrong-way driver, a young man from norton, was killed in a collision. the 21-year-old woman driving in the white suv was taken to the hospital with serious injuries. >> i feel bad for other families that have to deal with that on a day that means so much to be together with one family. >> reporter: police are trying to figure out how and why the they have extra patrols on the road for the holiday and they are reminding everyone to be extra careful and pay attention to the