Fu, L., Thakali, L, Kwon, T. J., & Usman, T. (2014). Winter Road Condition Classification and Reporting – A Risk Based Approach. Conference Proceedings of 14th International Winter Road Congress – World Road Association. Andorra la Vella, 4-7 Feb 2014
The paper presents a risk based approach for classifying the road surface conditions of a highway network under winter weather events. A relative risk index (RRI) is developed to capture the effect of adverse weather conditions on the collision risk of a highway in reference to the normal driving conditions. Based on this index, multiple risk factors can be considered together or individually. The index can also be used to aggregate different types of road conditions observed on any given route into a single class for risk-consistent condition reporting. Two example applications are shown to illustrate the advantages of the proposed approach.