One person was killed in a traffic collision, in north central Clarion County.     State Police identify the deceased as 26-year-old Brian Rozanski of the Rimersburg area.     The wreck took place along Route 66, in the area of the Zacherl Farm Market, in Paint Township, shortly before 1:30 Friday afternoon.     A motorcycle, operated by Rozanski, was headed one direction on Route 66, while another vehicle, driven by Ruby Norton of the Shippenville area, was headed the opposite way on 66.     The Norton vehicle began to try to make a turn into the farm market, across the path of the motorcycle.     The bike hit the front of the Norton vehicle.     At that point, Rozanski was thrown off of his motorcycle and landed nearly 200 feet away.     A helmet, which the biker had been wearing, was removed from his body upon the initial impact.     Rozanski was pronounced dead at the wreck site.     A third vehicle was also struck by some debris from this collision.     There is no word, from State Police, that anyone else was injured as a result of this collision.     Route 66, at the wreck site, was closed for three hours following the collision, while troopers conducted their investigation.     Called to aid, at the location, were Shippenville fire-rescue and ambulance crews.