"The purpose of the Traffic Control Devices Handbook (the Handbook or TCDH) is to augment the Manual on Uniform Traffic Control Devices for Streets and Highways (the Manual or MUTCD), as adopted nationally by the United States Federal Highway Administration (FHWA). The Manual outlines the design and application of traffic control devices on roadways in the United States. However, criteria and data to make decisions on the use of a device and its application are not always fully covered in the Manual. This Handbook bridges the gap between the Manual provisions and those decisions to be made in the field on device usage and application"--Provided by publisher.

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.

"The Manual of Uniform Traffic Control Devices for Canada (MUTCDC) is a flagship document for the Transportation Association of Canada, and is an essential tool for all professionals involved in traffic management and control. It provides optimum guidance and preferred methods in the design, dimensions and application of devices for the control of traffic and the provision of information to drivers and other road users. The MUTCDC provides information and diagrams on traffic signs, signals, pavement markings and temporary conditions, offering guidance on types, use, and placement for each. This guidance is applicable to the variety of road authorities and jurisidictions across the nation. These devices constitute a system for conveying messages to the road user which advise of traffic regulations in order to enable observance of the law, or warn of road characteristics, road hazards and temporary conditions. Meeting these objectives improves safety, serves the convenience of the road user, and promotes the efficient movement of persons and goods and the orderly flow of traffic."--Page [iii].