road safety barriers design guide part b - transport 道路安全屏障设计指导乙方运输.pdfVIP

DEPARTMENT OF INFRASTRUCTURE ENERGY AND RESOURCES ROAD SAFETY BARRIERS DESIGN GUIDE Part B Transport Infrastructure Branch i PURPOSE Keywords: Hazard identification, evaluation, performance standards, crash test, end treatments, types of barrier, design process, longitudinal barriers, end treatments, crash attenuators, transitions, maintenance, temporary safety barrier systems. The purpose of this guide is to provide guidelines for the identification of the need for a road safety barrier, the selection of an appropriate type of barrier, and the design and location of longitudinal barrier systems. The guide describes the processes used to identify hazards, test proposed safety barrier systems, evaluate treatment options and to design a road safety barrier system, including the choice of end treatments and transitions. It outlines a set of guidelines rather than a prescriptive set of standards. Therefore, designers should apply the recommended guidelines in conjunction with their own knowledge, experience and judgement to develop the most appropriate treatment for the issue that they are considering. However, every effort should the made to achieve the objectives of the guidelines whenever it is practically feasible. i i CONTENTS 6 BRIDGES AND BRIDGE APPROACHES3 7 TRANSITIONS BETWEEN BARRIER TYPES4 7.1 General4 7.2 Design Criteria –Physically Connected Barriers 4 7.3 Typical Interfaces between Barrier Types5 8 END TREATMENTS AND CRASH ATTENUATORS 9 8.2 Introduction 9 8.3 Types of End Treatments14