The Experts below are selected from a list of 210 Experts worldwide ranked by ideXlab platform
Brian K Diefenderfer - One of the best experts on this subject based on the ideXlab platform.
-
implementation of a network level falling weight deflectometer survey of virginia s Interstate System
Bearing capacity of roads railways and airfields: proceedings of the 8th International Conference on the Bearing Capacity of Roads Railways and Airfie, 2009Co-Authors: Brian K Diefenderfer, Tanveer Chowdhury, Raja A. ShekharanAbstract:The Virginia Department of Transportation currently uses the results of automated video distress surveys to develop a pavement maintenance budget based on a needs assessment. However, these data consist only of quantities of distress that were visually observable at the pavement surface; no information regarding the actual structural capacity of the pavement System was available. Therefore, it is likely that maintenance activities assigned to certain locations are not the optimal treatment because of conditions unseen at the surface. This study presents the results of a network-level FWD survey of Virginia’s Interstate System and describes an implementation process where the data are used in an updated decision tree structure. The results of this study can be used by pavement design and management engineers to ensure that maintenance funding is optimally spent and to develop condition forecasting tools to assist with future funding allocations based on the structural capacity of the pavement.
-
Implementation of a Network-Level Falling Weight Deflectometer Survey of Virginia’s Interstate System
2009Co-Authors: Brian K Diefenderfer, Tanveer Chowdhury, Raja A. ShekharanAbstract:The Virginia Department of Transportation currently uses the results of automated video distress surveys to develop a pavement maintenance budget based on a needs assessment. However, these data consist only of quantities of distress that were visually observable at the pavement surface; no information regarding the actual structural capacity of the pavement System was available. Therefore, it is likely that maintenance activities assigned to certain locations are not the optimal treatment because of conditions unseen at the surface. This study presents the results of a network-level FWD survey of Virginia’s Interstate System and describes an implementation process where the data are used in an updated decision tree structure. The results of this study can be used by pavement design and management engineers to ensure that maintenance funding is optimally spent and to develop condition forecasting tools to assist with future funding allocations based on the structural capacity of the pavement.
-
network level falling weight deflectometer testing statistical determination of minimum testing intervals and number of drop levels on virginia s Interstate System
Transportation Research Record, 2007Co-Authors: Javed Alam, Khaled A Galal, Brian K DiefenderferAbstract:A project was initiated to collect network-level falling weight deflectometer (FWD) data along Virginia's Interstate System. The FWD data collection aims to build a comprehensive database of deflection data and associated structural analysis to be used for future implementation of the Mechanistic-Empirical Pavement Design Guide. Virginia's current network-level evaluation protocol requires that pavements be tested every tenth of a mile at four drop levels, with three deflection basins (repetitions) collected at each drop level. To test the more than 2,000 lane miles of Interstate System, it was necessary to determine if the number of test points per mile and the number of load levels used could be reduced to increase the testing production rate and reduce the high cost of testing and traffic control. FWD testing was initiated on the entire length of I-77 and on portions of I-64 and I-81 by using the current testing protocol with only two deflection basins collected at each drop level. A comprehensive stat...
Kumares C. Sinha - One of the best experts on this subject based on the ideXlab platform.
-
Implementation and Evaluation of Self-Financing Highway Pricing Schemes: A Case Study
Transportation Research Record, 2007Co-Authors: Samuel Labi, Kumares C. SinhaAbstract:With the current and projected shortfalls in revenue vis-a-vis increasing needs, many transportation agencies are increasingly seeking alternative funding sources to supplement income from the motor fuel tax. One promising alternative, the fee for vehicle miles traveled (VMT), entails payment by drivers on the basis of their actual share of facility usage. This paper uses economic theory and travel demand and highway expenditure data from the State of Indiana as a basis to establish efficient VMT fee rates under various expenditure and funding scenarios. The authors have found that a VMT fee of 2.9 cents per mile, plus federal aid, would cover current expenditures for state-administered highways in the absence of any other revenue source, and that a fee of 2.2 cents per mile would be sufficient if revenue from vehicle registration was maintained. To cover the expenditures supported only by state-generated funds, the fee would be 1.3 cents per mile with vehicle registration revenues and 2.0 cents per mile without. This paper also establishes equitable fee structures that ensure self-finance of each facility class, as well as an alternative uniform-rate fee structure that entails cross-subsidy across facility classes. For the latter, it was found that the urban highway System would subsidize the rural System, the rural Interstate System would subsidize the rural non-Interstate System, and the urban non-Interstate System would subsidize the urban Interstate System. Different VMT fee structures could be established on the basis of desired levels of equity across the facility or user classes and of the technical feasibility of the implementation of VMT fees.
Samuel Labi - One of the best experts on this subject based on the ideXlab platform.
-
Implementation and Evaluation of Self-Financing Highway Pricing Schemes: A Case Study
Transportation Research Record, 2007Co-Authors: Samuel Labi, Kumares C. SinhaAbstract:With the current and projected shortfalls in revenue vis-a-vis increasing needs, many transportation agencies are increasingly seeking alternative funding sources to supplement income from the motor fuel tax. One promising alternative, the fee for vehicle miles traveled (VMT), entails payment by drivers on the basis of their actual share of facility usage. This paper uses economic theory and travel demand and highway expenditure data from the State of Indiana as a basis to establish efficient VMT fee rates under various expenditure and funding scenarios. The authors have found that a VMT fee of 2.9 cents per mile, plus federal aid, would cover current expenditures for state-administered highways in the absence of any other revenue source, and that a fee of 2.2 cents per mile would be sufficient if revenue from vehicle registration was maintained. To cover the expenditures supported only by state-generated funds, the fee would be 1.3 cents per mile with vehicle registration revenues and 2.0 cents per mile without. This paper also establishes equitable fee structures that ensure self-finance of each facility class, as well as an alternative uniform-rate fee structure that entails cross-subsidy across facility classes. For the latter, it was found that the urban highway System would subsidize the rural System, the rural Interstate System would subsidize the rural non-Interstate System, and the urban non-Interstate System would subsidize the urban Interstate System. Different VMT fee structures could be established on the basis of desired levels of equity across the facility or user classes and of the technical feasibility of the implementation of VMT fees.
Javed Alam - One of the best experts on this subject based on the ideXlab platform.
-
network level falling weight deflectometer testing statistical determination of minimum testing intervals and number of drop levels on virginia s Interstate System
Transportation Research Record, 2007Co-Authors: Javed Alam, Khaled A Galal, Brian K DiefenderferAbstract:A project was initiated to collect network-level falling weight deflectometer (FWD) data along Virginia's Interstate System. The FWD data collection aims to build a comprehensive database of deflection data and associated structural analysis to be used for future implementation of the Mechanistic-Empirical Pavement Design Guide. Virginia's current network-level evaluation protocol requires that pavements be tested every tenth of a mile at four drop levels, with three deflection basins (repetitions) collected at each drop level. To test the more than 2,000 lane miles of Interstate System, it was necessary to determine if the number of test points per mile and the number of load levels used could be reduced to increase the testing production rate and reduce the high cost of testing and traffic control. FWD testing was initiated on the entire length of I-77 and on portions of I-64 and I-81 by using the current testing protocol with only two deflection basins collected at each drop level. A comprehensive stat...
Raja A. Shekharan - One of the best experts on this subject based on the ideXlab platform.
-
Implementation of a Network-Level Falling Weight Deflectometer Survey of Virginia’s Interstate System
2009Co-Authors: Brian K Diefenderfer, Tanveer Chowdhury, Raja A. ShekharanAbstract:The Virginia Department of Transportation currently uses the results of automated video distress surveys to develop a pavement maintenance budget based on a needs assessment. However, these data consist only of quantities of distress that were visually observable at the pavement surface; no information regarding the actual structural capacity of the pavement System was available. Therefore, it is likely that maintenance activities assigned to certain locations are not the optimal treatment because of conditions unseen at the surface. This study presents the results of a network-level FWD survey of Virginia’s Interstate System and describes an implementation process where the data are used in an updated decision tree structure. The results of this study can be used by pavement design and management engineers to ensure that maintenance funding is optimally spent and to develop condition forecasting tools to assist with future funding allocations based on the structural capacity of the pavement.
-
implementation of a network level falling weight deflectometer survey of virginia s Interstate System
Bearing capacity of roads railways and airfields: proceedings of the 8th International Conference on the Bearing Capacity of Roads Railways and Airfie, 2009Co-Authors: Brian K Diefenderfer, Tanveer Chowdhury, Raja A. ShekharanAbstract:The Virginia Department of Transportation currently uses the results of automated video distress surveys to develop a pavement maintenance budget based on a needs assessment. However, these data consist only of quantities of distress that were visually observable at the pavement surface; no information regarding the actual structural capacity of the pavement System was available. Therefore, it is likely that maintenance activities assigned to certain locations are not the optimal treatment because of conditions unseen at the surface. This study presents the results of a network-level FWD survey of Virginia’s Interstate System and describes an implementation process where the data are used in an updated decision tree structure. The results of this study can be used by pavement design and management engineers to ensure that maintenance funding is optimally spent and to develop condition forecasting tools to assist with future funding allocations based on the structural capacity of the pavement.
