703 Guide for Pavement-Type Selection Accession Number: 01353742 Record Type: Monograph Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Washington, DC 20001 USA Order URL: Find a library where document is available Order URL: Abstract: This report presents a recommended "Guide for Pavement-Type Selection." The guide includes practical, logical, and transparent processes for conducting systematic evaluations of pavement alternatives and for making decisions on pavement-type selection. These processes can be used for both agency-based and contractor-based type selections and may be applied to different pavement types and structures. These processes are supplemented by examples to illustrate the application of the recommended guide for the commonly encountered scenarios of alternative bidding and design-build of operations and maintenance projects. The material contained in the report will be of immediate interest to state pavement engineers, design consultants, paving contractors, and others involved in project design and pavement-type selection. Report/Paper Numbers: Project 10-75
NCHRP 731 Guidelines for Timing Yellow and All-Red Intervals at Signalized Intersections Accession Number: 01453403 Record Type: Monograph Blurb URL: Record URL: Availability: Transportation Research Board Business Office 500 Street, NW Washington, DC 20001 USA Order URL: Find a library where document is available Order URL: Abstract: This report provides comprehensive and uniform guidelines for safe and efficient yellow change and all-red clearance intervals at signalized intersections. These proposed guidelines provide a framework that can be easily applied by state and local transportation agencies. This report will be of interest to safety and traffic engineers. Report/Paper Numbers: Project 03-95
NCHRP 743 Predicting the Initial Retroreflectivity of Pavement Markings from Glass Bead Quality Accession Number: 01475102 Blurb URL: Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Washington, DC 20001 USA Order URL: Find a library where document is available URL: Abstract: This report describes a proposed laboratory test method to predict the initial retroreflectivity of pavement markings in the field based on the quality of the applied glass beads. Thus, the report will be of immediate interest to state materials and maintenance engineers with responsibility for specification and placement of pavement marking materials. The project team conducted a combined laboratory and field experiment to develop, verify, and validate the proposed test method. The laboratory experiment addressed the characterization of glass beads and identified a drawdown test as a promising method to relate the laboratory retroreflectivity of glass beads to initial pavement marking retroreflectivity. The field experiment successfully verified and validated the laboratory results through a series of pilot- and full-scale pavement marking applications. Finally, the variability of the drawdown test method was estimated through a modified interlaboratory study. The study included five laboratories, which used the same set of beads and the same paint to conduct the drawdown test independently. Analysis of the results demonstrated that the test method is repeatable and reproducible. The report fully documents the research; a proposed laboratory test method in AASHTO standard format is presented in Chapter 5: Findings and Recommendations. In addition, the report includes Appendix A: Explanation for Statistical Graphing. Numbers: Project 04-38