The driver of the 18-wheeler, who was not injured, stated that he slowed down the rig because of rain. Troopers speculate that the reduced speed of the truck; combined with slippery conditions and possible lack of visibility, contributed to the crash. Investigators pointed out that rainy conditions can create serious risks for motorcycle riders. The surface of the roadway becomes extremely slick, especially when the vehicle is not equipped with tires that provide control and stability. Many experts advise not riding in wet conditions at all, and avoiding hitting the road shortly after rainfall. The roads are coated with brake fluid, oil, grime, and debris before it rains. Once the rain starts, these materials form into a deadly concoction on the pavement.