A large data set of approximately 330Gb is size and 6.5 billion data points recording vehicle movements at almost 300 locations on the National Road Network. Due to the size and nature of this dataset, data consumers will likely require some specialised tools and knowledge to handle and process it. Per Vehicle Records (PVR's) record the presence of vehicles as they pass the traffic counter and can identify vehicle category, number of axels, date and time, vehicle length (in mm), the gap between vehicles, headway and lane number. Individual vehicles are not identifiable.