Pre-Crash Interactions between Pedestrians and Cyclists and Intelligent Vehicles

016867392018Final ReportPDFTech ReportDTRT13-G-UTC47Autonomous vehiclesBicycle crashesDriving simulatorsIntelligent vehiclesPedestrian vehicle interfacePedestrian-vehicle crashesSimulationTraffic crashesHighwaysPedestrians and BicyclistsSafety and Human FactorsVehicles and EquipmentUnited StatesOhio State University. Crash Imminent Safety (CrIS) University Transportation CenterChen, YaobinOhio State University. Dept. of Electrical and Computer EngineeringTransportation Active Safety Institute (TASI)University Transportation Centers Program (U.S.)United States. Department of TransportationOhio State University. Crash Imminent Safety (CrIS) University Transportation CenterOzguner, UmitFisher, Donald L.US Transportation CollectionIn this paper we identified the most important bicyclist crash scenarios for crash imminent braking systems. Our tested scenario involved a crash geometry that is responsible for approximately a quarter of cyclist social cost and a third of cyclist fatalities in single light vehicle crashes. Its primary contribution is that it is based on actual test track data, rather than optimistic simulated performance. As such it embodies key crash features such as time to collision, vehicle speed, and importantly, the speed that cyclists bring to the collision. We developed a model of cyclist injuries based on injuries incurred by pedestrians, and adapted the results using delta-V in pace of vehicle speed at impact. We intend this as suggestive rather than definitive since it allows us to incorporate other modifying variables such as age and geometry. Our results are limited in that they examine only one scenario (albeit the most deadly) and only one manufacturer\u2019s vehicle. Still, they are suggestive about the limited co-benefits available in bicyclist CIB systems compared to pedestrian systems. The results lay out a methodology for the evaluation of other systems and scenarios. The design and enhancement of CIB systems, like our analysis, remain a work in progress.75