Abstract
Active traffic management (ATM) includes a suite of traffic management and control strat-egies that improve operational efficiency. These strategies are used to manage traffic flow to enhance capacity and safety. This synthesis documents the state of the practice associated with designing, implementing, and operating ATM on arterial roadways. Information used in this study was acquired through a review of the literature and in-depth interviews of selected transportation agencies. (Author/publisher) This report is available online at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_syn_447.pdf