Recent Developments on Road Readiness for Automated Driving
Current road design standards consider the perception reaction time of human drivers and operational characteristics of vehicles.However,there are differences between automated vehicles and human drivers in terms of the perception reaction time,perception distance,and perception height.These differences may lead to challenges for automated vehicles under specific road conditions such as complex road geometries and irregular intersections.To understand the impact of road infrastructure on the operation of automated vehicles,it is necessary to study road readiness for automated driving.Quantitative studies on the effects of different road types,road geometry designs,traffic control facilities,and roadside infrastructure on the safe operation of automated vehicles are insufficient.This paper summarized the findings from three perspectives:road segments,intersections,and traffic signs and markings.The results indicate the following:①Existing research has established a relationship between road geometry design,intersection geometry design,and the perception capabilities of automated driving.It was found that design parameters such as the horizontal curve radius,chord length,and curve deflection angle affect the sight distance in automated driving.② Real-world testing showed that the road type,horizontal curve curvature,and lane width have a significant impact on automated driving failure events.③ An increase in the market penetration of automated vehicles will lead to clearer rules for interaction among automated vehicles and enhanced road readiness.④ The accuracy of automated driving perception and recognition is affected by the retroreflectivity and placement of traffic signs,whereas the failure probability is related to the size of traffic markings,retroreflectivity coefficient,and extension edge lines.To satisfy the future demands of automated driving applications,it is necessary to conduct tests on existing roads to assess the impact of various complex operating conditions on the operation of automated vehicles.It is necessary to examine the impact of road design on the performance and safety of automated vehicles on new roads.
traffic engineeringautomated vehiclereviewroad readinessroad designtraffic sign and marking
NETL
NSTL
万方数据
维普
