PeMS03 and PeMS04

The datasets are sourced from the Caltrans Performance Measurement System (PeMS) in California, which monitors and collects real-time traffic data from over 39,000 sensors deployed on major highways throughout the state. The PeMS system collects data every 30 seconds and aggregates it into 5-minute interval, with each sensor generating data for 288 time steps daily. Additionally, road network structure data is derived from the connectivity status and actual distances between sensors.

本数据集源自美国加利福尼亚州交通局绩效测量系统（Caltrans Performance Measurement System，PeMS），该系统负责监测并收集部署于全州主要高速公路的39000余个传感器所采集的实时交通数据。PeMS系统每30秒采集一次原始数据，并将其聚合为5分钟间隔的统计单元，每个传感器每日可生成288个时间步长的数据。此外，道路网络结构数据源自传感器间的连通状态与实际间距。