Television news reports indicate that the crashes occurred a short distance from each other, and closed down the highway from exits 85 and 90 in the southbound lanes. Police report that a fed ex truck and a charter bus were among 20 vehicles involved in the first crash around 4:30 yesterday afternoon. Just up the road, 4 tractor trailers were involved in the second accident, which brought traffic to a standstill. I-81 was closed as of midnight last night. People told channel 21 in Harrisburg that they were stuck in traffic for several hours on their way home from work.