Long tunnel group full-chain cooperative dynamic vehicle speed management and control method and system

The invention provides a long tunnel group full-chain cooperative dynamic vehicle speed management and control method and system. The method comprises the following steps: acquiring traffic flow information, weather information and road surface state information of a long tunnel group; the traffic flow information, the weather information and the road surface state information belong to a pre-established long tunnel group variable speed limit traffic flow model, and variable speed limit values of different sections of the tunnel group are output; the long tunnel group variable speed-limiting traffic flow model is established after the traffic flow basic model is revised based on visibility and a road surface friction coefficient and then variable speed-limiting control is added; and the variable speed limit values of the different sections of the tunnel group are sent to the information issuing devices at the corresponding positions to be displayed, and/or sent to the vehicle-mounted terminal. According to th