The collision of three vehicles yesterday morning left two people injured and snarled traffic north of Jackson for over a half hour. According to Grand Teton National Park officials, a northbound vehicle driven by 71-year-old Frederick Kayne of Marco Island, Florida veered into the southbound lane, striking a pop-up camper pulled by an SUV. A second southbound vehicle swerved to the right and into the sagebrush alongside the road to avoid hitting the original vehicle as it was still crossing the southbound lane. That car too was struck by Kayne’s vehicle. The two southbound cars were driven by a father and son from Utah who were wrapping up a family vacation in Grand Teton National Park. Three ambulances, one fire engine and additional personnel and apparatus from Jackson Hole Fire/EMS, multiple park rangers and a park ambulance all responded to the accident. Park officials say Kayne and a passenger in the second southbound vehicle, Kevin Berry, were transported to St. John’s Medical Center for treatment. Park Rangers assisted by the Wyoming Highway Patrol are still investigating the accident, but neither drugs nor alcohol are believed to have been a factor in the crash.