Dynamic hard shoulder running and ramp closure are two active trac management (ATM) strategies that are used to alleviate highway trac congestion. This study aims to evaluate the e ects of these two strategies on congested freeways under non-recurring congestion. The study’s e orts can be considered in two parts. First, we performed a detailed microsimulation analysis to quantify the potential benefits of these two ATM strategies in terms of safety, trac operation, and environmental impact. Second, we evaluated the implementation feasibility of these two strategies. The simulation results indicated that the implementation of the hard shoulder showed a 50%–57% reduction in delay, a 41%–44% reduction in fuel consumption and emissions, and a 15%–18% increase in bottleneck throughput. By contrast, the implementation of ramp closure showed a 20%–34% decrease in travel time, a 6%–9% increase in bottleneck throughput, and an 18%–32% reduction in fuel consumption and emissions. Eventually, both strategies were found to be economically feasible.
Dynamic hard shoulder running and ramp closure are two active trac management (ATM) strategies that are used to alleviate highway trac congestion. This study aims to evaluate the e ects of these two strategies on congested freeways under non-recurring congestion. The study’s e orts can be consi...
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