Browsing by Author "Hashami, Maryam"
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Item Cost/Benefit Study of Spring Load Restrictions(2005-03-01) Levinson, David M; Marasteanu, Mihai O; Voller, Vaughan; Margineau, Ioana; Smalkowski, Brian; Hashami, Maryam; Li, Ning; Corbett, Mike; Lukanen, ErlandAcross the state of Minnesota, asphalt roads under the jurisdiction of counties, cities and townships have been controlled by restrictions that limit the total weight of each truck that uses those roads during the spring thaw period. During this time, the pavement weakens and the bearing capacity of the roadway is reduced. These policies vary from county to county and from road to road, depending on the capacity of the roads--typically, 5, 7 and 9 tons. While spring load restrictions serve to extend the useful life of the road, they also add significant burdens to truckers who are forced to re-route their vehicles and/or increase the number of trips in order to adhere to the policies. This study assesses the economic impact of lifting all vehicle restrictions during the spring thaw period. Economic benefits of lifting the bans include reduced cost to carriers; potential cost includes reduced pavement life. Their research concludes that if the policy is changed, the costs of additional damage could be recovered from those who use the roads. Recovering those costs could take the form of annual fees, appropriate fuel taxes and/or user charges paid by vehicle operators.Item Operating Costs for Truck(2004) Levinson, David M; Corbett, Michael; Hashami, MaryamThis study estimates the operating costs for commercial vehicle operators in Minnesota. A survey of firms that undertake commercial truck road movements was performed. The average operating cost per kilometer for commercial vehicle operators was calculated from the survey responses. Results show that the translog and Cobb-Douglas models have approximately equal explanatory power in estimating the total cost from the data. The models also revealed the presence of nearly constant returns to scale, a finding consistent with earlier studies; an increase in output (total truckloads) of 1% increases total costs by 1.04%.