What Road Elements are More Important than Others for Safe Driving on Urban Roads?

Hui Xu; Jianping Wu

doi:10.7307/ptt.v35i6.394

Authors

Hui Xu Department of Civil Engineering, Tsinghua University, Beijing
Jianping Wu Department of Civil Engineering, Tsinghua University, Beijing

DOI:

https://doi.org/10.7307/ptt.v35i6.394

Keywords:

urban road digitalization, road elements, importance ranking, driver heterogeneity, statistical difference

Abstract

Road elements are increasingly digitalized to provide drivers advanced assistance especially in the emergent or adverse conditions. It is challenging and expensive to accurately digitalize all the road elements especially on the urban roads with many infrastructures and complex designs, where we may focus on the most important ones at the first stage. This research designs a questionnaire to ask the drivers to rank the importance of the road elements in various driving conditions. Driver characteristics are also collected, including age, driving style, accident experience, and accumulated driving distance, to explore their effect on drivers’ cognition of road elements importance. It is found that driving is a complex activity, and the moving elements (e.g. surrounding cars) are more important than the non-moving ones. Attention should be paid to the road elements even distant from the ego car, to get prepared to the potential driving risk or penalty. Statistical difference between the experienced and non-experienced drivers recommends that driver assistance system should be sufficiently trained in various conditions, to build up autonomous driving tactics and skills. This research promotes the understanding of driving cognition pattern to provide insights into the development of road digitalization.

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