Road section main line toll station exit traffic jam prediction method and system

The invention discloses a road section main line toll station exit traffic jam prediction method and system, and the method comprises the following steps: S1, building a historical sample storage library according to the historical data of a toll station; s2, collecting real-time traffic data of a main line toll station, carrying out data loading preprocessing, and generating traffic information of a current time slice; s3, performing comparative analysis on the current time slice and time slices in a historical sample storage library to obtain traffic vectors Knext of the next time interval corresponding to K time slices of which the similarity ranks in the top; and S4, dividing the traffic vector Knext into a congestion set and an unobstructed set, and judging whether congestion occurs or not according to the quantitative relationship between the congestion set and the unobstructed set. According to the invention, based on high-quality highway networking toll data, short-time prediction and early warning of