Active Transportation and Demand Management (ATDM)  is the ability to dynamically manage recurrent and non-recurrent congestion based on prevailing traffic conditions in order to maximize the effectiveness and efficiency of traffic networks. ATDM measures can be primarily categorized as supply side and as demand side. Supply side measures seek to improve traffic network operation by directly changing capacity, speed and/ or signal timing plans. Demand side measures seek to improve traffic conditions by affecting the demand for travel through pricing, traveler information and marketing. ATDM strategies evolve as quickly as the detection, communication, data processing, and actuation technologies they employ.