Thesis (Ph. D.)--University of Texas at Austin, 2005. / Vita. Includes bibliographical references.

Thesis (Ph. D.)--Ohio State University, 1986. / Includes bibliographical references (leaves 234-245). Available online via OhioLINK's ETD Center.

This thesis concerns a survey of inter-regional or inter-urban commercial truck traffic at weigh scales in B.C. and how parts of the information collected can be used to calibrate a gravity model of the type proposed by the Federal Highways Administration (U. S. A.). The results of the calibration of both the 27 and 31 node models are compared with previous, calibration efforts In an intra-urban context. There is a relatively detailed presentation of the design and completion of this type of survey. Also, the role of the gravity model of trip distribution in the planning process is explained. A new method of determining the inter-zonal impedance is used. This impedance is based on trip cost and takes into account such things as type of terrain (level, rolling, mountainous). The results indicate that the calibration was successful. The use of the gravity model of trip distribution would appear to be an appropriate technique in the analysis of inter-urban commercial truck traffic. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate

El presente plan de negocios identifica la necesidad de contar con una oferta de alimentación saludable. La ventaja principal de este proyecto es que ofrecerá un menú balanceado, con información nutricional y que se renovará con stantemente. Además, su elaboración contará con la asesoría de un nutricionista y un chef. Este negocio contempla ofrecer la propuesta, inicialmente, a través de un food truck ubicado en San Isidro, debido a que concentra a nuestro público objetivo. Además, este distrito cuenta con la legislación necesaria para instalar este tipo de negocios y cuenta con una concentración de aquellos que se autodenominan saludables, pero que no cuentan con información nutricional ni sobre los beneficios de sus ingredientes. Los principales aspectos que hay que considerar para su creación son: el servicio (ubicación, comodidad del ambiente, una experiencia positiva en el producto y la atención), el concepto del restaurante (y que se refleje en la propuesta de la carta), así como la delimitación realista del público.

Safe and efficient transportation of fiber is an essential component of the forest products supply chain, yet log truck crashes are believed to have increased across the United States. We examined two federally maintained databases to explore crash characteristics. Study objectives were to characterize log truck crashes nationally and regionally, and to compare log trucks to other similar trucks and assess differences. An analysis of 383 crashes involving log trucks across the U.S. were divided into four geographic regions for regional assessment. Results indicate that log trucks were significantly more likely to experience a rollover (p<.0001) as compared to other large trucks types. The average age of log trucks involved in fatal crashes (13 years) was significantly older (p=.0109) than overall average age for other large trucks (7.6 years). Log truck driver age was significantly different between region (p=.0269) with the highest average age in the Western region (53.4) and the lowest average age in the Midwest region (45.5). Calculations of crash rates revealed that the national average was 0.7 fatal log truck crashes per 100 million ft3 of wood harvested. The highest rate of log truck crashes occurred in the Southeast with 0.9 fatal crashes per 100 million ft3 of wood harvested. Between 2011 and 2015 fatal log truck crashes increased by 41%. Log tractor-trailer crashes increased 33% while all tractor-trailer crashes increased by 16%. Our findings reveal sufficient differences between log trucks and other large trucks to justify additional research regarding causation of crashes. / Master of Science

Thesis (M.S.)--West Virginia University, 2001. / Title from document title page. Document formatted into pages; contains xiv, 97 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 90-92).

A dissertation submitted to the Faculty of Engineering and the BuiltEnvironment,University of the Witwatersrand,Johannesburg,in fulfilment of the requirements for the degree of Master of Science in Engineering, 2019 / A Performance-based Standards(PBS) framework legislates the dynamic performance and road-width usage of heavy vehicles,allowing the length and mass of a vehicle to exceed prescriptive legislation.The PBS framework defines the safe performance envelope of vehicles but does not optimise their safety and productivity.The design process to achieve the optimal productivity of PBS vehicles is highly iterative.An initial design is evaluated using multi-body dynamic ssimulation.If the required PBS performance is not achieved,design iterationsare made until the required PBS performance is achieved.The process is costly,time-consuming andcomputationallyexpensive.Theobjectiveofthisresearchistoquantifytherelativeeffect ofeachVehicleDesignParameter(VDP)ofamulti-bodyvehicledynamicsmodelonthevehicle safetyasmeasuredwithinthePBSframeworktoassistinthePBSassessmentprocess.To achievethis,threerepresentativebaselinePBSvehiclesweredeveloped(aquadsemi-trailer, trideminterlinkandrigiddrawbarcombination)fromPBSassessmentsconductedinSouth Africa.AsetofrangeswithinwhicheachVDPcouldbevariedwasdevelopedbyconsidering OriginalEquipmentManufacturer(OEM)data,legalrestrictions,physicalconstraintsand SouthAfricanPBSassessments.EachVDPforeachbaselinecombinationwasvariedin isolationtoevaluateitsinfluenceonthevehiclesperformancewithinthePBSframework.A comparative matrix was developed for each baseline vehicle comparing the relative influence of each VDP on each of the PBS performance measures.The matrices yield insight into which VDP shave the most influence on each performance measure for each of the baseline vehicles.Furthermore VDPs that have an egligible influence on the performance of all baseline vehicles can be conservatively estimated in the absence of OEM data while still predicting representative vehicle performance.These insights will guide designers to focus onVDPs with a high influence on vehicle performance,allow PBS assessors to determine which design parameters can be modelled with generic approximate data in the absence of OEMdata,and speedup the process of assessing vehicles with in the PBS framework. / TL (2020)

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Thesis (Ph. D.)--University of Hong Kong, 2006. / Title proper from title frame. Also available in printed format.