Development of a Flexible Winter Severity Index for Snow and Ice Control
Publication: Journal of Cold Regions Engineering
Volume 31, Issue 3
Abstract
Snow removal and ice control are critical to the safe and efficient use of roadways in much of the world. Tools that help road authorities plan for, assess, and communicate about winter maintenance activities are increasingly being sought. Weather indices that rate the severity of winter conditions in a given period at a particular location are one subset of such tools. Although several winter severity indices have been developed, many of these are complex and of limited practical use for road authorities. In this research, an approach for developing a simple-to-use, locally calibrated winter severity index (WSI) is outlined. The approach relies primarily on mathematical optimization but is flexible enough to allow expert knowledge to be incorporated. This approach is used in developing a WSI for the provincial highway system of the province of Alberta, Canada. The WSI assigns each day a weather score based on seven weather attributes and one seasonal adjustment factor. By using a classification and regression approach, the eight components are based on attribute-specific thresholds that then trigger a score. These daily scores are aggregated to the 14-day period and are correlated to maintenance activities. The WSI for Alberta highways has strong fit with maintenance activity that occurred, when measured as vehicle hours. At the 14-day level, the values for vehicle hours vary from 0.776 to 0.936 for eight contract areas, and when the data are aggregated over space or time, the fit improves further. This research illustrates how site-specific WSIs can be developed for road authorities through the use of optimization that alters the weather attribute thresholds and scores, reflecting the specific maintenance regimes in that location.
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Acknowledgments
The authors gratefully acknowledge the provision of weather data by Environment Canada. The Government of Alberta Ministry of Transportation funded this research project and provided all AVLS and RWIS data.
References
Andrey, J., Brenning, A., Kirchhoff, D., Mills, B., and Perchanok, M. (2008). “Modeling winter maintenance activities using classification trees.”, Transportation Research Board, Washington, DC.
Andrey, J., and Matthews, L. (2012). “Winter severity index (WSI) for road salt management in Canada.”, Univ. of Waterloo, Waterloo, ON, Canada.
Andrey, J., Matthews, L., Hambly, D., and Mills, B. (2014). “Winter severity indices and road maintenance.” ⟨https://www.wmo.int/pages/prog/arep/wwrp/new/wwosc/documents/Andreyetal_wwosc2014_index.pdf⟩ (May 10, 2016).
Decker, R., Bignell, J., Lambertsen, C., and Porter, K. (2001). “Measuring efficiency of winter maintenance practices.” Transp. Res. Rec., 1741, 167–175.
Khattak, A. J., and Knapp, K. K. (2001). “Snow event effects on interstate highway crashes.” J. Cold Reg. Eng., 219–229.
Mayes Boustead, B. E., Hilberg, S. D., Shulski, M. D., and Nubbard, K. G. (2015). “The accumulated winter season severity index (AWSSI).” J. Appl. Meteorol. Climatol., 54(8), 1693–1712.
Nixon, W., and Qiu, L. (2005). “Developing a storm severity index.” Transp. Res. Rec., 1911, 143–148.
Phillips, D. (1990). “The climates of Canada.” Government of Canada, Canada.
Roh, H. J., Sahu, P. K., Sharma, S., Datla, S., and Mehran, B. (2016). “Statistical investigations of snowfall and temperature interaction with passenger car and truck traffic on primary highways in Canada.” J. Cold Reg. Eng., .
Salt Institute. (2015). “Salt: Production and industry.” ⟨http://www.saltinstitute.org/salt-101/production-industry/⟩ (May 10, 2016).
Shi, X., Veneziano, D., Xie, N., and Gong, J. (2013). “Use of chloride-based ice control products for sustainable winter maintenance: A balanced perspective.” Cold Reg. Sci. Technol., 86, 104–112.
Strong, C., and Shvetsov, Y. (2006). “Development of roadway weather severity index.” Transp. Res. Rec., 1948, 161–169.
Suggett, J., Hadayegi, Al., Mills, B., Andrey, J., and Leach, G. (2006). “Development of winter severity indicator models for Canadian winter road maintenance.” Transportation Association of Canada, Ottawa.
Thornes, J. E. (1993). “Cost-effective snow and ice control for the 1990s.” Transp. Res. Rec., 1387, 185–190.
Tsapakis, I., Cheng, T., and Bolbol, A. (2013). “Impact of weather conditions on macroscopic urban travel times.” J. Transp. Geogr., 28, 204–211.
Usman, T., Fu, L., and Miranda-Moreno, L. F. (2010). “Quantifying safety benefit of winter road maintenance: Accident frequency modeling.” Accid. Anal. Prev., 42(6), 1878–1887.
Venäläinen, A. (2001). “Estimation of road salt use based on winter air temperature.” Meteorol. Appl., 8(3), 333–338.
Ye, Z., Xu, Y., Veneziano, D., and Shi, X. (2014). “Evaluation of winter maintenance chemicals and crashes with an artificial neural network.” Transp. Res. Rec., 2440, 43–50.
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©2017 American Society of Civil Engineers.
History
Received: May 11, 2016
Accepted: Dec 7, 2016
Published ahead of print: Feb 27, 2017
Published online: Feb 28, 2017
Discussion open until: Jul 28, 2017
Published in print: Sep 1, 2017
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