...The technologies used to aid efficient operation of the road network include the Motorway Incident Detection and Automatic Signalling (MIDAS) system and Managed Motorways. MotorGraph is a key tool in assessing the performance of these systems. MotorGraph provides plots for all major stretches of motorway across England that have traffic detection and signalling installed. This unique facility provides all available real-time and historic data in one place, allowing users to access and interpret information about all systems on instrumented motorways. The live and historic information provided by MotorGraph allows licenced users to assess and track operational performance of control systems on motorways; monitor live and historic traffic patterns; optimise traffic control systems and identify sources and causes of congestion.