Forecasting Markers of Habitual Driving Behaviors Associated with Crash Risk

Date

2018-05

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Abstract

Increasingly sophisticated driver assistance systems enhance safety by issuing notifications upon sensing lane departures or applying the brakes when detecting imminent collisions. Such systems, although remarkable, are reactionary and machine centered. Here we propose a method that is mixed in its approach, preventive in its aim, and predictive in its function. The method uses multimodal measurements of the driver’s physiological variables and readings of the vehicle’s driving parameters, selecting the most informative features out of them to feed an extreme gradient boosting machine learning algorithm. The model operates upon these select features in a time window covering the recent past to make short-term predictions for the immediate future, regarding the driver’s distraction and driving style. The drivers are classified as distracted based on the presence of mental activity or physical interactions antagonistic to the driving task; their driving style is determined by steering and acceleration and is classified as aggressive or normal. Reliable short-term predictions of such behaviors, especially of repeated nature, can provide sobering awareness to the drivers, who often drift to these states subconsciously. These predictions can also inform remedial actions in future advanced driver assistance systems. The method has been tested on SIM 1 – a publicly available dataset from a major distracted driving experiment (n=59), featuring over 1.5 hours of driving for each participant and 10 channels of information, captured via unobtrusive physiological and vehicle sensors. Using 30 seconds from the immediate past, the method predicted for the next 10 seconds distracted driving with 84% accuracy and aggressive driving with 87% . It also supported previous findings and revealed further associative patterns of sympathetic arousal with driving behavior.

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Keywords

Affective Monitoring, Machine learning, Safety driving

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