Road Traffic Time-Series Measurements of Flow and Occupancy from 10,150 Loop Detectors in 25 Cities

This road traffic data set consists of multiple time-series of flow-occupancy measurement pairs obtained by 10,150 loop detectors in 25 cities. In total there are 168,183,675 flow-occupancy measurement pairs in the data set, of which 147,034,646 measurement pairs are good (i.e. not flagged as errors). Each measurement pair corresponds to a time interval that is typically of 3 or 5 minutes in duration. The time-series data were obtained mainly from the period 2015 to 2018, with some data obtained in 2008. The time-span of each series depends on the city where the data were obtained, and varies from 6 to 372 days. Each time-series (i.e. each loop detector) has at least 900 good flow-occupancy measurement pairs. The data set also includes information on the loop detectors and the roads on which they are located, the majority of which are interrupted flow facilities (i.e. roads with intersections). Note that the flow-occupancy measurement pairs from a single loop detector form an empirical fundamental diagram.