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 Traffic Engineering Division has been conducting a study to determine the feasibility and applicability of traffic circles as a speed control device. Experimental traffic circles were installed at three intersections in residential areas in the city. Before and after speed surveys show a very impressive drop in speeds close to the intersection. The general conclusion is that the traffic circle has merits in reducing speeds in residential areas but further in-depth studies need to be conducted.

This book presents a history of roundabouts, an introduction to their design, calculations of their capacity and traffic-safety features. It describes the key features of standard roundabouts and their limitations. Alternative types of roundabouts are a fairly recent development and have only been implemented in a few countries to date. The book illustrates a broad variety of these recent alternative types of roundabouts, as well as proposed types still in the development phase, explaining for each the specific needs it meets, its advantages and drawbacks. In closing, the book offers an outlook on the role of roundabouts in future street traffic.

Today, we're married to our cars. But life behind the wheel of an automobile didn't come naturally to Americans. Crooked politicians, unscrupulous businessmen, burning streetcars, and convoluted tax shenanigans are a few of the players in this gripping tale of corruption, greed, and endless miles of asphalt. In Andy Singer's accessible, scandalous tale of motordom, comics, text, and historic photographs tell the story of the rise of the U.S. highway system and the corresponding demise of rail and public transportation. He also explores how we can ditch the car and rebuild a functional transportation system that can bring wealth, happiness, and freedom.