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Citation |
Turner DS. Transp. Res. Rec. 1987; 1122: 86-96. |
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Copyright |
(Copyright © 1987, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing) |
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DOI |
unavailable |
PMID |
unavailable |
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Abstract |
This paper is intended to serve as an introductory guide for those who want to become familiar with the clear zone concept. A design engineer might find this document a good way to gain proficiency, or a transportation agency might consider it to be the first step toward developing its own clear zone policy. The clear zone philosophy has been defined at the federal level, but practicing engineers at the state or especially the local level have not fully grasped the procedure. One reason is that engineering judgment is required for virtually every application at virtually every site. Design concepts and applications for treatment of specific fixed hazards have developed on a number of fronts. For example, AASHTO has at least 10 separate publications. The local engineer may not be aware of where to obtain the appropriate design guidance before addressing each site. In addition, difficult decisions must be made about funding priorities and timetables. This document presents a brief synopsis of roadside clear zone topics. It condenses and sets forth the overriding principles, and gives several general example applications that should prove useful to the practicing engineer. Language: en |
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Keywords |
HIGHWAY TRAFFIC CONTROL; TRANSPORTATION; HIGHWAY ENGINEERING; HIGHWAY SYSTEMS - Accident Prevention |