Driving behavior analysis with smartphones: insights from a controlled field study

Authors:
Johannes Paefgen;Flavius Kehr;Yudan Zhai;Florian Michahelles
Affiliations:
University of St. Gallen, ITEM-HSG, Dufourstrasse, Gallen, Switzerland;University of St. Gallen, ITEM-HSG, Dufourstrasse, Gallen, Switzerland;ETH Zurich, D-MTEC, Weinbergstrasse, Zurich, Switzerland;ETH Zurich, D-MTEC, Weinbergstrasse, Zurich, Switzerland
Venue:
Proceedings of the 11th International Conference on Mobile and Ubiquitous Multimedia
Year:
2012

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Abstract

We evaluate a mobile application that assesses driving behavior based on in-vehicle acceleration measurements and gives corresponding feedback to drivers. In the insurance business, such applications have recently gained traction as a viable alternative to the monitoring of drivers via "black boxes" installed in vehicles, which lacks interaction opportunities and is perceived as privacy intrusive by policyholders. However, pose uncertainty and other noise-inducing factors make smartphones potentially less reliable as sensor platforms. We therefore compare critical driving events generated by a smartphone with reference measurements from a vehicle-fixed IMU in a controlled field study. The study was designed to capture driver variability under real-world conditions, while minimizing the influence of external factors. We find that the mobile measurements tend to overestimate critical driving events, possibly due to deviation from the calibrated initial device pose. While weather and daytime do not appear to influence event counts, road type is a significant factor that is not considered in most current state-of-the-art implementations.