Aggregated data (per time period):
These data consist of part or all of the individual measurements summed or averaged over a given period of time (e.g. 6 mn, 1 hr, 1 day, 1 week, 1 month, 1 yr).
- Traffic classification (% per types of vehicles over a given time period)
- Classified flow: mean number of vehicles or axles of a given type per time unit
- Histograms of any of the detailed data (type/class of vehicles, speed, vehicle length or axle spacing, GVW or axle load, etc.)
- Means, standard deviations, fractiles of any of the detailed data
Some WIM systems provide only aggregated data, which limits the storage capacity. The aggregated data may be calculated afterwards.
Short time aggregated data (e.g. 6 mn, 1 hr) are used for real time traffic information and management. Long time aggregated data (1 week to 1 yr) are used for statistics, traffic monitoring and road operation or maintenance.