Expressway Route Optimization by OCP

Shaw, Jocelyn F. B.; Howard, Bernard E.

doi:10.1061/tpejan.0000984

Cited by 27 publications

(4 citation statements)

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“…Based on this principle, Howard et al (1968) developed the Optimum Curvature Principle (OCP) for horizontal highway alignment design model. This model was applied in finding a maritime route through dynamic ice field (Thomson & Sykes, 1988) and horizontal alignment of an expressway in flat south Florida (Shaw & Howard, 1982). In both applications authors used local cost function to represent the discreteness of cost at different zones.…”

Section: Highway Alignment Optimizationmentioning

confidence: 99%

Highway Alignment Optimization Using Cost-Benefit Analysis Under User Equilibrium

Maji¹,

Jha

2011

International Journal of Operations Research and Information Systems

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Usually, selection of a highway alignment depends on an economical route that minimizes alignment sensitive costs, such as construction cost, user cost, right-of-way cost, and earthwork cost. Most of the available highway alignment optimization algorithms do not consider traffic assignment and distribution of traffic as a result of the new road network consisting of the new alignment as well as other pre-existing alignments. Constructing a new highway will ease the traffic in the existing road network. Based on Wardrop’s principle, the users will choose a route that will minimize their travel-time. Users will unilaterally shift to the available routes for their benefit and thus, traffic flow will attain equilibrium. Theoretically, the equilibrium of traffic flow between the existing highway and the newly designed highway alternative can be achieved by a user equilibrium model. A new methodology is developed in this paper to optimize a new three-dimensional highway alignment based on the existing highway alignment system information using a cost-benefit analysis approach. The results are quite promising for new road design and bypass construction since benefit maximization and cost minimization is performed simultaneously while attaining user equilibrium.

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Section: Highway Alignment Optimizationmentioning

confidence: 99%

Highway Alignment Optimization Using Cost-Benefit Analysis Under User Equilibrium

Maji¹,

Jha

2011

International Journal of Operations Research and Information Systems

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“…Conditions 2-6 are especially important for optimization. Most optimization models in the literature (7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) lack one or more of these conditions. The recent work by Jong ( 1) is promising because it deals with conditions 2-6.…”

Section: Hdommentioning

confidence: 99%

Integrating Genetic Algorithms and Geographic Information System to Optimize Highway Alignments

Jha¹,

Schonfeld

2000

Transportation Research Record: Journal of the Transportation R

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A comprehensive highway cost model can be used for optimizing highway alignments subject to a number of design constraints. Because a geographic information system (GIS) can spatially represent the locations of properties, floodplains, streams, and other geographical characteristics of significance in a highway cost model, it can provide valuable input to a highway design optimization model. Additionally, a GIS-based model can be developed to compute geographically sensitive costs to be used with an iterative optimization scheme. However, connecting a GIS to a highway optimization model requires full automation of an entire search process in which there is a continuous exchange of inputs and outputs until the optimized solution is obtained. An integrated model is developed by linking a GIS model with an optimization model employing genetic algorithms (GAs). The GIS model provides accurate geographical features, computes location-dependent costs, and transmits these costs to an external program. That program computes length-dependent costs and user costs and then, using GAs, optimizes the highway alignment to minimize the sum of all costs. An example study using real land use and environmental features is presented for a part of Talbot County, Maryland. The computational performance of the integrated model is assessed.

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“…Initially, Turner and Miles [2] developed an alignment model that searches the shortest paths on calculated grid networks characterizing relative costs. After this earlier study, Shaw and Howard [3] and Trietsch [4] implemented different horizontal highway alignment models. However, the majority of researchers focused on the development of vertical alignment models for predetermined horizontal alignments.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Optimization Algorithm for Vertical Alignment of Highways

Göktepe

Lav

Altun

2005

MCA

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In all design criteria, earthwork optimization is essential for the determination of optimal vertical alignment of a highway project. Actually, there can be numerous grade line alternatives for given ground elevations; thus, the objective is to find out the optimal vertical alignment causing the minimum cost considering several design constraints. Basically, this is a constrained nonlinear optimization problem, which can be solved by a multistage optimization technique. This article introduces a methodology for the vertical alignment optimization of a highway using dynamic programming approach. Results indicated that the introduced algorithm can be used successfully in the optimization of vertical highway alignment.

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Expressway Route Optimization by OCP

Cited by 27 publications

References 0 publications

Highway Alignment Optimization Using Cost-Benefit Analysis Under User Equilibrium

Highway Alignment Optimization Using Cost-Benefit Analysis Under User Equilibrium

Integrating Genetic Algorithms and Geographic Information System to Optimize Highway Alignments

Dynamic Optimization Algorithm for Vertical Alignment of Highways

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