Supported by the results of behavioural studies, changes in driving behaviour have been modelled and implemented in a microscopic traffic simulation model (MIXIC). Next, this simulation model has been applied to study the effects of several AICC penetration levels and target headway settings on traffic safety and traffic performance. The simulation results confirmed the notion from earlier studies that AICC systems can contribute to a more stable traffic flow without sacrificing capacity. These results were found for penetration levels on passenger cars of 20% (target headway 1.0 s and 1.5 s) and 40% (target headway 1.0 s). However, for 40% penetration and a target headway of 1.5 s a deterioration on the traffic performance was found at the higher levels of traffic demand: the speed collapsed, especially on the left lane.
Samenvatting