摘要: |
The Roadway Delineation Practices Handbook was developed to assist design, traffic, and maintenance engineering personnel in making determinations about roadway delineation systems, including the appropriate system for a given situation, when a system has reached the end of its useful life, and how to maintain a quality delineation system. It may also be valuable to consulting engineers, educators, and students. This Handbook supplements the policies and standards provided in the Manual on Uniform Traffic Control Devices by offering implementation guidelines for the standards. The contents cover current and newly developed devices, materials, and installation equipment, presenting each item's expected performance based on actual experience or field and laboratory tests. The Handbook draws on the experiences of Federal, State, county, and city agencies and summarizes future directions and developments as reported in recent research and by industry's technical representatives. Individual chapters cover the characteristics of retroreflection and quality assurance, driver visibility needs, traffic paints, preformed tapes, raised pavement markers and other marking materials, post-mounted delineators and other delineation devices, and administrative and management issues and practices. The appendices provide detailed technical information, including cost analysis techniques; sources of materials and equipment; and a list of standards, specifications, and test methods related to delineation. |