Recently, after the highway traffic jams, how to utilize the huge amounts of toll collection data to quickly and accurately retrieve the beginning point of traffic jams is still lack of satisfactory solutions. This article, based on the highway toll collection data of Hunan province, retrieves the traffic parametric features, such as the car entry time, car departure time, travel time, and motorcycle type, and proposes a method to calculate the beginning point of jams between adjacent two toll collection st...