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Cooperative adaptive cruise control(CACC)vehicles are intelligent vehicles that use vehicular ad hoc networks(VANETs)to share trafc information in real time.Previous studies have shown that CACC could have an impact on increasing highway capacities at high market penetration.Since reaching a high CACC market penetration level is not occurring in the near future,this study presents a progressive deployment approach that demonstrates to have a great potential of reducing trafc congestions at low CACC penetration levels.Using a previously developed microscopic trafc simulation model of a freeway with an on-ramp—created to induce perturbations and trigger stop-and-go trafc,the CACC system s efect on the trafc performance is studied.The results show signifcance and indicate the potential of CACC systems to improve trafc characteristics which can be used to reduce trafc congestion.The study shows that the impact of CACC is positive and not only limited to a high market penetration.By giving CACC vehicles priority access to high-occupancy vehicle(HOV)lanes,the highway capacity could be signifcantly improved with a CACC penetration as low as 20%.
Cooperative adaptive cruise control (CACC) vehicles are intelligent vehicles that use vehicular ad hoc networks (VANETs) to share trafc information in real time. Previous studies have shown that CACC could have an impact on increasing highway capacities at high market penetration. high CACC market penetration level is not occurring in the near future, this study presents a demonstrated potential progress of reducing trafc congestions at low CACC penetration levels. Using previously released microscopic trafc simulation model of a freeway with an on-ramp-created to induce perturbations and trigger stop-and-go trafc, the CACC system sfect on the trafc performance is studied. The results show signifcance and indicate the potential of CACC systems to improve trafc characteristics which can be used to reduce trafc congestion.The study shows that the impact of CACC is positive and not only limited to a high market penetration.By givin g CACC vehicles priority access to high-occupancy vehicle (HOV) lanes, the highway capacity could be signifcantly improved with a CACC penetration as low as 20%.