Crowd-sourcing based road surface evaluation using mobile sensing

Road conditions monitoring system is one of important tools for Intelligent Transportation System (ITS). The monitoring system can facilitate road administrator to assess deterioration of road surface for maintenance, and assist driver for safety. Recently, smartphones were used as monitoring tools because of sensor-rich and Internet-enabled capability. Our research is aimed to developed tools for monitoring road distress based on smartphone sensors. In this research, we proposed virtual reorientation method for smartphone during driving. accelerometer, magnetometer and GPS positioning were used to determine relative orientation between smartphone and vehicle. Additionally, we proposed road conditions detection system based on support vector machine. Road bump and pothole conditions was focused. In the end of this paper, the result of system assessment by field test data reveal that our proposed system work successfully.