PROCEDURE FOR DETECTING ERRORS IN ALINEMENT DESIGN AND CONSEQUENCES FOR SAFER REDESIGN
A procedure for evaluating the horizontal alinement of two-lane rural roads on the basis of three individual safety criteria is introduced. On the basis of these criteria, design practices are classified into three groups: good, fair, and poor. The procedure can be used to identify potential safety errors in new designs already in the planning stages as well as to detect safety deficiencies in existing roadways. To be effective, the safety evaluation process must be integrated into the modern highway design tools available to highway design engineers of today. These tools consist of computer-automated design (CAD) systems for highway geometric design and normally contain a component for the design of horizontal alinement. To incorporate the safety evaluation process into the horizontal alinement component of a commonly used CAD system, a subprogram for safety computations was developed on the basis of the three individual criteria. The safety evaluation process provides a future assessment of horizontal alinement on the basis of quantitative criteria. Consequently, safety impacts can be included along with the normally considered local, environmental, esthetic, and economic aspects in making decisions on a project. A case study of an existing two-lane rural roadway in southwestern Germany is included. On the basis of safety criteria, sections of the road have poor design. The safety evaluation procedure is applied to the identification of safer redesigns. In a first step for an economical redesign, still sections with fair design practices are included. In a second step for a redesign of an overall sound curvilinear alinement, only good design practices exist.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309060516
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1445, Cross Section and Alinement Design Issues. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
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Authors:
- Lamm, Ruediger
- Steffen, Heiko
- Guenther, A K
- Publication Date: 1994
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 64-72
- Monograph Title: Cross section and alinement design issues
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Serial:
- Transportation Research Record
- Issue Number: 1445
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Alignment; Case studies; Computer aided design; Curves (Geometry); Design; Geometric design; Highway design; Rural highways; Safety; Two lane highways
- Uncontrolled Terms: Horizontal alignment; Redesign
- Geographic Terms: Germany
- Old TRIS Terms: Curvilinear alignment
- Subject Areas: Design; Highways; Safety and Human Factors; I20: Design and Planning of Transport Infrastructure;
Filing Info
- Accession Number: 00675331
- Record Type: Publication
- ISBN: 0309060516
- Files: TRIS, TRB, ATRI
- Created Date: Mar 20 1995 12:00AM