Vehicle speed planning method and system considering front vehicle influence and traffic light information

The invention discloses a vehicle speed planning method and system considering the influence of a front vehicle and traffic light information, and the method comprises the steps: A, building a traffic map model, and obtaining the driving data; b, predicting the speed of a preceding vehicle; c, the maximum vehicle speed allowed to be reached by the vehicle in the future is calculated; and D, calculating whether the vehicle can pass through the next intersection in the green light window period at the allowed vehicle speed, if so, increasing the speed to the allowed maximum vehicle speed, and if not, reducing the speed to ensure that the vehicle passes through the intersection when the next green light arrives. The planning system comprises an offline part and an online part, the offline part is used for executing the step B, and the online part is used for executing the step C and the step D. The method comprehensively considers the influence of the preceding vehicle and traffic light information, considers th