Hao Wang

TL;DR: The theoretical and simulation results conformably indicate that the CACC system brings dramatic benefits for reducing rear-end collision risks, when the desired time headway and time delay are set properly, and the safety improvements weaken with the decrease of the penetration rates of CACC on the market and the increase of time delay between platoons.

TL;DR: In the initial stage, the combination of ACC and a variable speed limit achieved better safety improvements on congested freeways than each single technique, and showed that the safety impacts of ACC were largely affected by the parameters.

TL;DR: It was found that the empirical Bayesian (EB) method and the kernel density estimation (KDE) method outperformed other HRSI approaches and can eventually be considered a simplified version of the EB method.

TL;DR: In this paper, the authors have carried out a large scale experiment to study the car-following behavior in a 51-car platoon and found that there exists a critical speed between 30 and 40 km/h, above which the standard deviation of car velocity is almost saturated (flat) along the platoon.

TL;DR: An infrastructure-to-vehicle (I2V) integrated system that incorporated both ACC and VSL to reduce rear-end collision risks on freeways is developed and indicates that safety benefits increase with an increase in ACC proportions.