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Abstract
This study aims to determine the optimal winter speed limit through the application of a cost analysis
and by analysis of effects of road and traffic conditions. Initially, a cost analysis of travel time
costs, vehicle operating costs, pollution costs, and accident cost was applied to determine optimal
average speed on the basis of the minimum total cost. Then, the effects of road and traffic conditions
were calculated by regression analysis. Finally, the optimal winter speed limits were achieved. In
conclusion, we found that our model was reliable and the results were appropriate and sustainable
for the long term.