The issue was to improve understanding of driver behavior, particularly speed selection, during winter road conditions in order to address high speed variation and associated decreases in road safety during adverse weather. Models were developed for speed selection behavior based on different weather parameters. Truck percentage was also included in the model because of its important impact. Furthermore, an analysis was done to identify how sensitive traffic operations are to changes in the weather-related parameters during adverse weather conditions. A model was developed in VISSIM tool using observed traffic parameter data during ideal and different storm events.
Driving risk could increase as roadway conditions become more hazardous because of adverse weather conditions. This could lead to an increase in crash
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