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7 report(s) found with mathematical models in the keywords field
1 - 7 of 7
 

The purpose of this study is to provide information about railroad fuel efficiency that may be useful in evaluating transportation energy policies and assessing the sustainability of potential projects. The specific objectives are to (1) develop railroad energy efficiency models that describe differences...

 

Rising fuel prices have led to significant increases in costs for public transit agencies. A possible benefit from higher gas prices, though, is an increase in public transit ridership. This study estimates the effects of gas prices on bus ridership by employing a variety of models. Since the price of...

 

The study 1) examines the impacts of the Clean Air Act Amendments of 1990 (CAAA90) on coal production and coal flows; 2) shows that future changes in nationwide transportation rates could have a major impact on regional coal production and market shares; and 3) presents a model of rail rates, showing...

 

The objectives of this projects were to: 1) develop a load test facility which can be used to perform static lateral load tests on model piles, 2) establish a prototype pile and a corresponding model pile, 3) design and implement the instrumentation for the model pile, 4) calibrate the model piles, 5)...

 

The primary objective of this research was to establish statistically valid mathematical models that can explain the variations in accidents as a function of geometric variables. Engineers and planners will be able to use these models to examine the sensitivity of accident rates to any of the independent...

 

This project examines the feasibility of developing a model from other data to ascertain the likelihood of a certain safety rating. This would enable efforts to be concentrated on the motor carrier firms with the least probability of achieving a Satisfactory rating and reduce the need to visit every...

 

The objectives of this initial study were 1) investigate the relationship between resilient modulus and R-value; and 2) develop a predictive equation for resilient modulus based on easily measured soil properties. Thirteen different fine-graded soils were investigated. Based on the test results, two...

 
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