Vaisala Nu-Metrics WDM Traffic Analyzer Software is designed to operate with the Vaisala Permanent Traffic system. WDM software assembles the traffic data and displays if conveniently on your PC or laptop. Graphs, charts, or reports are easily created from the user-friendly software. Data such as current counts, past hour, past day, occupancy, average speed, and length, weather data and visual lane representation can be displayed.