A major traffic incident took place on I-81 in Oswego County, New York, involving around 40 vehicles. The pileup happened in Richland Township on the southbound lanes between Exit 126 towards Pulaski and Exit 131 towards Tinker Tavern. The New York State Police are investigating the incident, which involved multiple tractor-trailers. The crash has caused significant delays, and the southbound lanes have been closed to allow emergency vehicles access to the scene. The Oswego County Sheriff's Office is assisting in the investigation. The cause of the accident is believed to be related to adverse weather conditions, including heavy lake effect snow and cold winds affecting the area.