The Experts below are selected from a list of 84 Experts worldwide ranked by ideXlab platform
Karen K Dixon - One of the best experts on this subject based on the ideXlab platform.
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Road User Cost models for network level pavement management
Transportation Research Record, 2000Co-Authors: Govindarajan Vadakpat, Shelley M Stoffels, Karen K DixonAbstract:Life-cycle Cost analysis (LCCA) of pavements is a process for evaluating total economic worth of a usable project segment by analyzing initial Costs and discounted future Costs, such as those for maintenance, reconstruction, rehabilitation, and resurfacing. One of the most important ingredients in the LCCA process, at either a network level or a project level, is the determination of Road User Cost (RUC) during maintenance and rehabilitation operations. RUC models are also important in contracting strategies, which take into account time for a project to be completed for award and payment. Methods used to date to determine RUC are exclusively analytical in nature. Microscopic estimates of traffic are used to determine RUC. CORSIM, a microscopic traffic simulation program developed by FHWA, was used for this research. Models for additional travel time, added fuel consumption, and RUC for standard two-to-one lane closure scenarios are presented.
Govindarajan Vadakpat - One of the best experts on this subject based on the ideXlab platform.
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Road User Cost models for network level pavement management
Transportation Research Record, 2000Co-Authors: Govindarajan Vadakpat, Shelley M Stoffels, Karen K DixonAbstract:Life-cycle Cost analysis (LCCA) of pavements is a process for evaluating total economic worth of a usable project segment by analyzing initial Costs and discounted future Costs, such as those for maintenance, reconstruction, rehabilitation, and resurfacing. One of the most important ingredients in the LCCA process, at either a network level or a project level, is the determination of Road User Cost (RUC) during maintenance and rehabilitation operations. RUC models are also important in contracting strategies, which take into account time for a project to be completed for award and payment. Methods used to date to determine RUC are exclusively analytical in nature. Microscopic estimates of traffic are used to determine RUC. CORSIM, a microscopic traffic simulation program developed by FHWA, was used for this research. Models for additional travel time, added fuel consumption, and RUC for standard two-to-one lane closure scenarios are presented.
John T Harvey - One of the best experts on this subject based on the ideXlab platform.
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regression models of Road User Cost prediction for highway maintenance and rehabilitation for life cycle planning in california
Transportation Research Record, 2021Co-Authors: Sampat Kedarisetty, Changmo Kim, John T HarveyAbstract:Road User Costs (RUCs) have been studied for the past few decades and still need to be considered to obtain a complete picture of the impact of Road construction, maintenance, and rehabilitation. R...
Alleman Douglas - One of the best experts on this subject based on the ideXlab platform.
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INTEGRATING CA4PRS V.3 Road WIDENING SCHEDULE MODULE INTO US HIGHWAY EARLY CONSTRUCTABILITY PROCESS: CALIFORNIA SR-91 CORRIDOR IMPROVEMENT PROGRAM CASE STUDY
VILNIUS GEDIMINAS TECH UNIV, 2020Co-Authors: Lee, Eul Bum, Alleman Douglas, Thamas David, Kim ChangmoAbstract:Performing Constructability Review Processes (CRPs) during the highway design development has been found to save transportation agencies twice their input Costs. However, existing literature has identified three areas of CRP improvement: reduction of required agency resources, incorporation of Road User Cost (RUC) scheduling constraints, and integration of assessment visualizations. The authors propose to fill this gap by integrating the Construction Analysis for Pavement Rehabilitation Strategies (CA4PRS) v.3 software into the CRP. This module provides agencies with Road widening project schedule capabilities, which enhances CRPs by providing accurate RUC-constrained critical path schedules using minimal resources. The module was developed through interviews with subject matter experts from six public and two private California transportation organizations. Said experts also tested the CA4PRS v.3 alpha and beta pre-release versions using data collected from eight Caltrans Road widening projects. The potential value-adding of integrating the CA4PRS v.3 software with existing CRPs has been tested through its application on the California State Road 91 (SR-91) Corridor Improvement Program (CIP), resulting in 24-months of construction acceleration. The findings and presentation of the schedule model within this paper provide practitioners an accurate and resource-efficient tool to estimate the schedule impacts of Road widening constructability options.1
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Incorporating Road User Costs into Integrated Life-Cycle Cost Analyses for Infrastructure Sustainability: A Case Study on Sr-91 Corridor Improvement Project (Ca)
'MDPI AG', 2019Co-Authors: Lee, Eul Bum, Thomas, David K., Alleman DouglasAbstract:Life-cycle Cost analysis (LCCA) is a decision-making tool that allows governing agencies the ability to assess several long-term alternative investment options. This paper presents a LCCA analysis process which integrates the Federal Highway Administration (FHWA) program, RealCost (a Road User Cost calculation program), the FHWA-endorsed Construction Analysis for Pavement Rehabilitation Strategies (CA4PRS) and Caltrans specific design tools (CalFP and CalAC), into the existing Caltrans LCCA process (a modified version of the FHWA LCCA process). In using tools backed by the FHWA and validated through previous agency use, the presented process has a potential to be replicated on urban corridor improvement projects across the US while aiding agencies in achieving economical sustainability throughout the infrastructure maintenance phases. This paper also fills the gap identified by Ozbay et al. in 2004, incorporating Road User Cost calculations into the LCCA process. Validation was achieved through the execution of the recently completed $1.4 B US California SR-91 Corridor Improvement Project. The SR-91 team used the presented tool to choose one of the two alternatives (maintain HOV SR-91 lane and add I-15 HOV lane using long-life Portland Cement Concrete Pavement or add Express Lane to SR-91 and I-15 using long-life Continuously Reinforced Concrete Pavement and Asphalt Concrete Pavement), equating to an estimated life-Cost savings of $32 M.12
Shelley M Stoffels - One of the best experts on this subject based on the ideXlab platform.
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Road User Cost models for network level pavement management
Transportation Research Record, 2000Co-Authors: Govindarajan Vadakpat, Shelley M Stoffels, Karen K DixonAbstract:Life-cycle Cost analysis (LCCA) of pavements is a process for evaluating total economic worth of a usable project segment by analyzing initial Costs and discounted future Costs, such as those for maintenance, reconstruction, rehabilitation, and resurfacing. One of the most important ingredients in the LCCA process, at either a network level or a project level, is the determination of Road User Cost (RUC) during maintenance and rehabilitation operations. RUC models are also important in contracting strategies, which take into account time for a project to be completed for award and payment. Methods used to date to determine RUC are exclusively analytical in nature. Microscopic estimates of traffic are used to determine RUC. CORSIM, a microscopic traffic simulation program developed by FHWA, was used for this research. Models for additional travel time, added fuel consumption, and RUC for standard two-to-one lane closure scenarios are presented.
