Companies 33, 41, and R45 were sent to I81 SB near MM50.4 for an accident at 22:04 Sunday evening. Chief 7 arrived and found one passenger vehicle had been struck by a tractor trailer. The truck was located nearby. Squad 33 crew checked the passenger vehicle while E141 checked the truck. EMS reported no injuries and units cleared leaving Fire Police and Chief 7 remaining. This was the fourth call of the day for Co. 33.