Trade-offs Between Initial and Maintenance Costs of Highways in Cross-Slopes
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Volume 9, Issue 1
Abstract
Highway maintainability is a significant issue, which should be considered in the planning stages of a highway development process. A number of infrastructure models such as highway maintenance management systems, bridge management systems, and pavement management systems have been developed to predict future maintenance expenditures. However, these models only predict maintenance costs after a highway is built, and do not provide the flexibility of exploring various alternatives in the planning stages. In this work formulations for initial and maintenance costs have been developed based on the design variables which can be chosen to minimize these costs, focusing on the sideslopes in cut and fill sections. Maintenance cost has been represented as a function of sideslope width of highway cross section and annual average daily traffic. Sideslope is represented as a function of soil type. The proposed formulations are used in a highway design optimization model to optimize highway alignments. An example is presented to investigate the sensitivities of maintenance cost and soil characteristics in selecting alignments, using a real geographic database from Maryland. The results indicate that maintenance cost and soil characteristics are important considerations in alignment optimization.
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Information & Authors
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Published In
Journal of Infrastructure Systems
Volume 9 • Issue 1 • March 2003
Pages: 16 - 25
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: May 10, 2001
Accepted: Jun 4, 2002
Published online: Feb 14, 2003
Published in print: Mar 2003
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