The Radar speed attachment enables a pre-set message to be displayed on the Mobile VMS as normal. When the pre-set speed limit is exceeded, the radar will then trigger a warning message to the motoring public. The data logging function works in conjunction with this, collecting statistics on vehicle speed which is then generated into a graph format. This graph can be produced periodically i.e. hourly, daily, weekly etc. The data logger option also enables collection of average speeds and number of vehicles approaching (directional). The data can be downloaded via a USB key at the trailer or remotely through JamLogic (modem option required).