The aim of the Winter Model is to estimate and put a value on the most important impacts of the strategies and measures in winter road management for road users, road management authorities and society at large. The main report itself is a summary of the reports that describe the submodels in the Winter Model. The hub of the model is the Road Condition Model which, on the basis of weather data, undertaken road management measures and traffic, calculates road conditions hour by hour during the winter season. The Road Condition Model controls calculations in the effect models: Accident Model, Accessibility Model, Vehicle Cost Model, Environment Model and Model for Road Management Costs. The Accident Model calculates accident rates, accident types and consequences, all coupled with different road conditions and their duration. The Accessibility Model calculates the effect of different road conditions on mean speeds and trip times. The Vehicle Cost Model calculates the costs of fuel consumption and corrosion due to road salt. The Environment Model calculates the impacts on roadside vegetation due to road salt. The Model for Road Management Costs calculates both the direct costs of the measures and the costs of damage to, and wear of, road surfacing, road markings etc as a result of road management measures (A). This document is also available at http://www.vti.se/EPiBrowser/Publikationer/R531.pdf
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