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- W610098021 abstract "One of the key obstacles of freight transportation planning is the lack of truck origin and destination (OD) trip matrices. The Commodity Flow Survey (CFS) is the only nationwide freight movement data collection effort of the past two decades. CFS provides freight movement information at the national, state, and at selected metropolitan area levels. Most of the CFS freight movement information is presented by commodity and mode of transport in terms of ton and value (dollars). To adapt CFS to freight studies at the State and Metropolitan Planning Organization (MPO) level however, additional efforts would be needed. It would be desirable that the freight flow information be converted to truck traffic in terms of number of trucks. This paper describes a new methodology for estimating truck load factor information from the truck weight information. This paper postulates that the truck gross operating weight distribution is composed of three normal weight distributions; those being: 1) empty trucks, 2) partial truckloads or “loaded to size limit” trucks, that is, a truck fully loaded with Styrofoam packaging material (full, but nowhere near the weight limit) and 3) “loaded to weight limit” trucks. The theoretical framework of the proposed methodology hinges largely on the maximum likelihood estimation of the mixture of normal distributions. Based on this methodology, truck gross operating weight distributions for combination trucks with three axles on the tractor and two axles on the semi-trailer (CS5 or 3S2) have been estimated for Iowa and New York. By using the observed “empty weight” distribution for empty trucks, the estimated truck “empty weight” distribution has been validated. A suggestion on how to use the truck load information is also presented." @default.
- W610098021 created "2016-06-24" @default.
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- W610098021 date "2006-01-01" @default.
- W610098021 modified "2023-09-23" @default.
- W610098021 title "Converting Freight Flow information to Truck Volumes" @default.
- W610098021 hasPublicationYear "2006" @default.
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