TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts. This report updates the U.S. Federal Highway Administration's Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.

"This report is intended to serve as the Participant Handbook containing the course material for the FHWA-sponsored training course of the Design and Operation of Work Zone Traffic Control. The intent of the course is to teach the proper application of the principles of Part 6 of the Manual on Uniform Traffic Control Devices (MUTCD). The course materials include design elements showing the proper design and layout of work zones under varying traffic and roadway conditions. Sample problems are presented to allow the participants of the course to apply the design guidelines to specific situations. Also included in the material are forms and procedures for inspecting and monitoring the safety and operation of work zones."--Technical report documentation p.

With full color photographs and other illustrations.