An Investigation of the Factors Surrounding Crashes of ADAS-Equipped Vehicles, TPF-5(505), 2025

(2025) An Investigation of the Factors Surrounding Crashes of ADAS-Equipped Vehicles, TPF-5(505), 2025. Transportation, Department of

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Abstract

This project aimed to investigate the impact of advanced driver assistance systems (ADAS) in real- world crashes and near-crashes. The project considered the perspectives of motorists and law enforcement officers. A survey and interviews gathered information about the motorist's understanding of ADAS and the characteristics of the incident and the vehicle. Motorists reported incidents where ADAS had been beneficial and where ADAS had caused or contributed to the incident. Motorists demonstrated a range of understanding about the ADAS on their vehicles. Some appeared to conflate the functionality of different systems or provided information that contradicted the owner's manual. The officer survey and interview guide asked about their understanding of ADAS, their approach to gathering information about ADAS, crash reporting, and training about ADAS. Very few officers consider ADAS during their crash investigations. Officers cited a lack of training and said considering ADAS was unnecessary because ultimately the driver is still responsible for the crash. Only a few officers who completed the survey had received any training about ADAS. Over 80% of the officers who completed the survey agreed they wanted to receive training about ADAS. Despite the lack of formal or informal ADAS training, many officers rated their level of understanding for various ADAS as high, especially for the three types of collision warnings and adaptive cruise control, and reported the presence of ADAS on a vehicle they drive for work or personal use. The findings from this project inform several recommendations for different stakeholders, including departments of transportation and infrastructure owners/operators, law enforcement, crash reporting agencies, and vehicle manufacturers and dealerships.