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Program evaluation of highway access with innovative risk-cost-benefit analysis
ارزیابی برنامه دسترسی بزرگراهها با تحلیل نوآورانه تجزیه و تحلیل ریسک-هزینه-سود-2020 Access management is used to control vehicular ingress and egress to adjacent property, where the main goal is
to preserve the safety and capacity of the transportation network. Access management can assist in protecting
billions of dollars in current investments in the transportation infrastructure, yet it is common for transportation
planners to have limited resources, including budgets, equipment, time, human resources, and others, and thus
they need principled approaches for allocating their limited resources across a large network of highways. This
research develops a framework that can be used to prioritize competing needs for access management among
thousands of access points. A key innovation of this research is the integration of risk analysis and cost-benefit
analysis with data uncertainties. This will be accomplished by introducing three risk components—hazard intensity,
exposure, and vulnerability—that can be used to evaluate roadway performance and to monetize the
potential benefits and costs of access management projects. These components are then presented in a threedimensional
diagram to facilitate tradeoff analysis and to allow for risk-cost-benefit analysis with data uncertainties
and tradeoff analysis to complement one another. The developed framework is demonstrated by
applying it to four major U.S. highways with a combined length of 321.95 km. Keywords: System safety | Resource allocation | Risk-cost-benefit analysis | Priority setting | Data uncertainty | Engineering systems |
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