Author: Massachusetts Institute of Technology. Urban Systems Laboratory
Publisher:
ISBN:
Category : Freight and freightage
Languages : en
Pages : 102
Book Description
A Methodological Approach to Commodity Flow Analysis in the State of California
Author: Massachusetts Institute of Technology. Urban Systems Laboratory
Publisher:
ISBN:
Category : Freight and freightage
Languages : en
Pages : 102
Book Description
Publisher:
ISBN:
Category : Freight and freightage
Languages : en
Pages : 102
Book Description
Transportation
Report
Rail planning manual
Author: United States. Federal Railroad Administration
Publisher:
ISBN:
Category : Railroads and state
Languages : en
Pages : 762
Book Description
Publisher:
ISBN:
Category : Railroads and state
Languages : en
Pages : 762
Book Description
Modeling Statewide Commodity Flows
Author: Lawrence G. Scott
Publisher:
ISBN:
Category : Commercial products
Languages : en
Pages : 60
Book Description
Publisher:
ISBN:
Category : Commercial products
Languages : en
Pages : 60
Book Description
Interregional Commodity Flow Model Using Structural Equation Modeling
Author: Fatemeh Ranaiefar
Publisher:
ISBN: 9781303643460
Category :
Languages : en
Pages : 133
Book Description
Freight forecasting models are data intensive and may require many explanatory variables to achieve prediction accuracy. One problem, particularly in the United States, is that public data sources are usually available only at highly aggregate geographic levels, while models with more disaggregate geographic levels are required for regional freight transportation planning. A second problem is that supply chain effects are often ignored or modeled with economic input-output models which lack explanatory power. This study addresses these challenges by considering a Structural Equation Modeling approach, that is not confined to a specific spatial structure as spatial regression models would be, and allows for correlations between industries. The goal of the proposed methodology is to design a reliable and policy sensitive modeling framework for long term commodity flow forecasting that makes the best use of public available data sources. Practicality and improvement over previously available freight generation and distribution models are the highlights of this approach. There are two primary developed in this study. The first one is a structural commodity generation model. The second model is the Structural Equations for Multi-Commodity OD Distribution (SEMCOD) model. The proposed framework is implemented as a primary module in California Statewide Freight Forecasting Model (CSFFM) and will be used to update the California Transportation Plan (CTP 2015). The models are specified and estimated based on FAF3 data. It is shown that the proposed modeling framework provides a better fit to the data than independent regression models for each commodity. The three components of the models are: direct and indirect effects, supply chain elasticities at zone level and at origin-destination level, and intra-zonal supply-demand interactions. A validation of the geographic scalability of the model is conducted using a zoning system consisting of 97 county or sub-county zones in California.
Publisher:
ISBN: 9781303643460
Category :
Languages : en
Pages : 133
Book Description
Freight forecasting models are data intensive and may require many explanatory variables to achieve prediction accuracy. One problem, particularly in the United States, is that public data sources are usually available only at highly aggregate geographic levels, while models with more disaggregate geographic levels are required for regional freight transportation planning. A second problem is that supply chain effects are often ignored or modeled with economic input-output models which lack explanatory power. This study addresses these challenges by considering a Structural Equation Modeling approach, that is not confined to a specific spatial structure as spatial regression models would be, and allows for correlations between industries. The goal of the proposed methodology is to design a reliable and policy sensitive modeling framework for long term commodity flow forecasting that makes the best use of public available data sources. Practicality and improvement over previously available freight generation and distribution models are the highlights of this approach. There are two primary developed in this study. The first one is a structural commodity generation model. The second model is the Structural Equations for Multi-Commodity OD Distribution (SEMCOD) model. The proposed framework is implemented as a primary module in California Statewide Freight Forecasting Model (CSFFM) and will be used to update the California Transportation Plan (CTP 2015). The models are specified and estimated based on FAF3 data. It is shown that the proposed modeling framework provides a better fit to the data than independent regression models for each commodity. The three components of the models are: direct and indirect effects, supply chain elasticities at zone level and at origin-destination level, and intra-zonal supply-demand interactions. A validation of the geographic scalability of the model is conducted using a zoning system consisting of 97 county or sub-county zones in California.
Commodity Flow Analysis in the SCAG Region
Author: Massachusetts Institute of Technology. Urban Systems Laboratory
Publisher:
ISBN:
Category : Freight and freightage
Languages : en
Pages : 148
Book Description
Publisher:
ISBN:
Category : Freight and freightage
Languages : en
Pages : 148
Book Description
Corridor 1990
Author: Steven B. Colman
Publisher:
ISBN:
Category : Freight and freightage
Languages : en
Pages : 144
Book Description
Publisher:
ISBN:
Category : Freight and freightage
Languages : en
Pages : 144
Book Description
Highway Noise
Author: B. Andrew Kugler
Publisher: Transportation Research Board National Research
ISBN:
Category : Science
Languages : en
Pages : 850
Book Description
A description of motor vehicle noise sources and the potential for their control is provided. The report presents an overview of the suggested noise prediction methodology, which is a four step process that includes approximating noise impacts using a nomograph procedure to determine noise levels associated with given traffic and site characteristics; refining these predictions by more accurate representation of design parameters and use of a computer program that is able to plot as well as calculate noise impact; introducing appropriate noise-control options and evaluate them, using a noise barrier nomograph solution; lastly, selected options are fully evaluated using the computer program.
Publisher: Transportation Research Board National Research
ISBN:
Category : Science
Languages : en
Pages : 850
Book Description
A description of motor vehicle noise sources and the potential for their control is provided. The report presents an overview of the suggested noise prediction methodology, which is a four step process that includes approximating noise impacts using a nomograph procedure to determine noise levels associated with given traffic and site characteristics; refining these predictions by more accurate representation of design parameters and use of a computer program that is able to plot as well as calculate noise impact; introducing appropriate noise-control options and evaluate them, using a noise barrier nomograph solution; lastly, selected options are fully evaluated using the computer program.
National Cooperative Highway Research Program Report
Author:
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 1226
Book Description
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 1226
Book Description