A bus collided with a tractor-trailer early Wednesday, killing at least one woman and injuring 45 of the 50 passengers on board. At least four of those injuries are considered critical. The driver of the tractor-trailer told the Sunbury Daily that the bus struck his rig in the back, but declined to comment further. The bus had been heading from New York City to Cleveland, with the crash occurring off I-80 in Union City, near the New York border. The bus driver had been with Greyhound for 12 years, a spokesman said.