Life-Cycle Cost Analysis of Highway Intersection Safety Hardware Improvements

Madanu, Sunil; Li, Zongzhi; Abbas, Montasir

doi:10.1061/(asce)te.1943-5436.0000082

Cited by 17 publications

(10 citation statements)

References 14 publications

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“…This study introduces a refined method based on the risk-based safety analysis method developed by Madanu et al [6], which incorporates traffic control and safety hardware performance functions into the analytical process. The contribution of this research is in terms of the refinements, specifically utilizing the time-varying safety hardware performance functions to compute the Safety Index (SI) which correlates the traffic control and safety hardware condition prior to safety improvements with changes in the hardware condition after improvements.…”

Section: Introductionmentioning

confidence: 99%

“…The estimated changes in the observed crash frequency and severity post-implementation of safety improvement projects are computed by considering the conditions of the traffic control and safety hardware as average constant observed values, which in reality might not be applicable to site-specific conditions for a long period of time [8,9]. Alternatively, Madanu et al [6] used the pre-and post-implementation percentage changes in the observed crash frequency by severity level for comparable sites for a safety improvement project, but did not capture the variability of such changes that are collectively affected by multiple crash contributing factors over time. As a practical matter, the percentage changes are dependent on the time of the observed data with respect to the useful service life of the traffic control and safety hardware.…”

Section: Introductionmentioning

confidence: 99%

“…Researchers have attempted to incorporate the concept of performance-based analysis relying on the condition of facility preservation and impacts of changes in the facility condition on the performance for safety analysis and project evaluation. Madanu et al [6] developed a methodology incorporating the life-cycle cost analysis for refined estimation of impacts of the traffic control and safety hardware on crash predictions, to address the limitations of the existing traditional methods for safety impacts assessment of highway safety hardware improvements. The risk-based methods for safety analysis employ the computation of the safety index (SI) by combining the traffic exposure, crash frequency, and crash severity factors for estimating the crash frequency associated with a highway segment [2,5,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

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Incorporating Traffic Control and Safety Hardware Performance Functions into Risk-based Highway Safety Analysis

Li¹,

Dao

Patel

et al. 2017

PROMET

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goal. Over the past few decades, many analytical methods, models, and tools have been developed and refined to realistically estimate vehicle crashes on a highway segment. In addition, they quantify the expected benefits of safety improvement projects, and prioritize the economically feasible projects under budget constraints to ensure achieving the maximized safety benefits to users on the highway system. The various categories of traffic control and safety hardware, such as traffic signs, lighting, signals, pavement markings, guardrails, barriers, and crash cushions require holistic management with the highway facilities, vehicles, drivers, and the environment to collectively reach effective safety performance. The required analytical methods for traffic control and safety hardware are an important and non-separable part for holistic and efficient safety analysis and management.The interaction of factors relating to highway facilities, vehicles, drivers, and environment, contribute to the occurrence of a vehicle crash on a highway segment. Over the past few decades, researchers have studied the categories of geometric design, consistency of design standards, pavement conditions, and roadside features for detailed analysis of safety issues attributable to highway segments [1,2,3,4,5]. Meanwhile, the condition of the traffic control and safety hardware has a significant impact on the safety of the users. In fact, the service lives of major highway facilities contributing to the safety performance ABSTRACT

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Incorporating Traffic Control and Safety Hardware Performance Functions into Risk-based Highway Safety Analysis

Li¹,

Dao

Patel

et al. 2017

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“…The positions of the upper and lower contours on the crash-intensity and exposure plot depend on the extreme values of the intervals. (Madanu et al 2010). The analysis might also be extended across the facility service life cycle ).…”

Section: Sub-regionsmentioning

confidence: 99%

“…assess the impacts of risk and uncertainty in project level life-cycle benefits and costs analysis and create one stochastic optimization model for project selection in highway investment decision-making. Madanu et al (2010) introduce an approach for project-level cost-benefit analysis of a highway intersection hardware improvement. Szimba and Rothengatter (2012) integrate the interdependence among projects in cost-benefit analysis to select and prioritize the infrastructure projects of an investment package.…”

Section: Cost-benefit Analysis For Resource Allocationmentioning

confidence: 99%

Heterogeneous Data Uncertainties in Risk Management of a Multiscale Transportation Program

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Access management, which systematically limits opportunities for egress and ingress of vehicles to highway lanes, is critical to protect trillions of dollars of current investment in transportation. While access management can be effective to avoid crashes, reduce travel times, and increase route capacities, the literature suggests a need for metrics to guide investments in resource allocation across large networks at several time horizons and geographic scales. This dissertation describes a decision aid to support a multiscale transportation access management program via a risk-cost-benefit tradeoff analysis with heterogeneous sources of data and expertise, addressing incomplete or partially relevant information on regions, decision criteria, crash rates, travel speeds, road condition, project costs, and other factors. The approach quantifies safety improvement, travel-time savings, and costs of access management through functional relationships of input parameters including crash rates, corridor access point densities, and traffic volumes. Parameter uncertainties, which vary across regions and time horizons, are addressed via numerical interval analyses. The integration of methods is demonstrated for 6,000 highway miles of a 43,000 square-mile region and its several sub-regions. The demonstration prioritizes route segments that would benefit from risk assessment and risk management, including (i) right of way purchases, (ii) restriction of access points, (iii) new alignments, (iv) developer proffers, (v) further data collection, (vi) further expert elicitation, (vii) etc. The philosophy of approach is generally applicable to address uncertainties of heterogeneous data in resource allocation and decision making for multiscale systems.

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A New Approach for Macroscopic Analysis to Improve the Technical and Economic Impacts of Urban Interchanges on Traffic Networks

Hosseini

Mehrabian

Ebrahimi

et al. 2021

Advances in Intelligent Systems and Computing

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Perusing three important elements (economic, safety and traffic) is the overall objective of decision evaluation across all transport projects. In this study, we investigate the feasibility of development of city interchanges, and road connections for network users. In order to achieve this goal, a series of smaller goals are required including determining benefits, costs of implementing new highway interchanges, quantifying the effective parameters, quantifying the increase in fuel consumption, quantifying the reduction in travel time and growth in travel speeds. In this study, geometric advancement of Hakim highway, and Yadegar-e-Emam highway was investigated just Macro from cloverleaf intersection with a low capacity to three-level directional intersection and enhanced cloverleaf. For this purpose, the simulation was done by EMME/2 software. The results of the method of net present value (NPV) were evaluated economically, and the benefit and cost of each one was stated precisely in different years (%28 improvement). The sensitivity analysis indicated that the cost of fuel, cost of travel time, cost of accidents and cost of pollutants have the highest impact factor in this assessment respectively.

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Life-Cycle Cost Analysis of Highway Intersection Safety Hardware Improvements

Cited by 17 publications

References 14 publications

Incorporating Traffic Control and Safety Hardware Performance Functions into Risk-based Highway Safety Analysis

Incorporating Traffic Control and Safety Hardware Performance Functions into Risk-based Highway Safety Analysis

Heterogeneous Data Uncertainties in Risk Management of a Multiscale Transportation Program

A New Approach for Macroscopic Analysis to Improve the Technical and Economic Impacts of Urban Interchanges on Traffic Networks

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