The invention relates to an urban road vehicle speed prediction method, belongs to the technical field of vehicle speed prediction, and solves the problem of low prediction accuracy caused by neglecting the spatial-temporal correlation of the vehicle speed in the prior art. Comprising the following steps: collecting vehicle speed of each node in an urban road network, constructing a sample set, and dividing a training set from the sample set; constructing a dynamic adjacency matrix according to the network topology structure of each node in the training set and the daily vehicle speed probability; performing multi-period division on the training set according to a time sequence, constructing a plurality of network models according to each period, and fusing outputs of the plurality of network models to obtain a prediction model; training a prediction model based on the training set and the dynamic adjacency matrix to obtain a trained prediction model; and collecting the vehicle speed of a node to be predicted, selecting a sample to be predicted of each time period according to the time period to be predicted and a preset sample number of each time period, transmitting the sample to be predicted into the trained prediction model, and obtaining the vehicle speed of the time period to be predicted. Accurate prediction of the vehicle speed is realized.
本发明涉及一种城市道路车辆速度预测方法,属于车速预测技术领域,解决了现有技术中因忽略车速的时空相关性而导致预测准确度不高的问题。包括:采集城市道路网络中各节点的车辆速度,构建样本集,从样本集中划分出训练集;根据训练集中各节点的网络拓扑结构和每日的车辆速度概率,构建动态邻接矩阵;按照时间顺序对训练集进行多时段划分,根据各时段构建多个网络模型,融合多个网络模型的输出得到预测模型;基于训练集和动态邻接矩阵,训练预测模型,得到训练好的预测模型;采集待预测节点的车辆速度,根据待预测时段和预置的各时段样本数量,选取各时段的待测样本传入训练好的预测模型,得到待预测时段的车辆速度。实现了车辆速度的精准预测。
Urban road vehicle speed prediction method
一种城市道路车辆速度预测方法
2023-07-25
Patent
Electronic Resource
Chinese
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / G06N COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS , Rechnersysteme, basierend auf spezifischen Rechenmodellen |
Urban road traffic vehicle speed detection device and detection method
European Patent Office | 2023
|Urban-Road Average-Speed Prediction Method Based on Graph Convolutional Networks
Transportation Research Record | 2023
|Urban road speed prediction method considering spatial-temporal characteristics of traffic network
European Patent Office | 2023
|Vehicle following speed prediction method and system using vehicle-road cooperative data
European Patent Office | 2021
|