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Introductory technical guidance for civil engineers and highway managers interested in traffic calming strategies for small communities. This report focuses specifically on reducing high vehicle speed typical on cross-county highways to lower speed when the highway intersects small rural communities.
Introductory technical guidance for civil engineers and highway managers interested in traffic calming strategies for small communities. This report focuses specifically on reducing high vehicle speed typical on cross-county highways to lower speed when the highway intersects small rural communities.
Traffic calming promises to be an important tool for improving the quality of life in American cities. It slows down or diverts automobiles so that streets are safe and inviting to pedestrians, bicyclists, and children at play. Traffic calming also makes drivers aware that they are sharing street space with other users. Used successfully in Europe, traffic calming is now being considered by many U.S. cities. This report examines the myths of traditional traffic planning and how such planning must change to provide safer streets. It describes basic traffic calming principles and techniques and examines their effects on traffic volume and speed in neighborhoods. This report also shows how to avoid the pitfalls some communities have experienced in integrating traffic calming into their planning programs.
The document reports the state of traffic calming programs in the United States. It also includes historical information about programs in other countries. For the purposes of this report, traffic calming involves changes in street alignment, installation of barriers, and other physical measures to reduce traffic speeds and cut-through volumes in the interest of street safety, livability, and other public purposes. This report focuses mainly on physical measures, including street closures and other volume controls under the traffic calming umbrella. Education and enforcement activities, such as neighborhood traffic safety campaigns, fall outside the umbrella but will be mentioned where relevant.
Many rural communities have developed around highways or major county roads; as a result, the main street through small rural communities is often part of a high-speed rural highway. Highways and county roads are characterized by high speeds outside the city limits; they then transition into a reduced speed section through the rural community. Consequently, drivers passing through the community often enter at high speeds and maintain those speeds as they travel through the community. Traffic calming in small rural communities along major roadways is common in Europe, but the U.S. does not have experience with applying traffic-calming measures outside of major urban areas. The purpose of the project was to evaluate traffic-calming treatments on the major road through small Iowa communities using either single-measure low-cost or gateway treatments. The project was partially funded by the Iowa Highway Research Board (IHRB). The focus of the IHRB portion was to evaluate single-measure, low-cost, traffic-calming measures that are appropriate to major roads through small communities. The research evaluated the use of two gateway treatments in Union and Roland; five single-measure treatments (speed table, on pavement "SLOW" markings, a driver speed feedback sign, tubular markers, and on-pavement entrance treatments) were evaluated in Gilbert, Slater, and Dexter.
A comprehensive how-to manual for traffic calming in the United States. Planners and engineers can look to this manual for guidance on the appropriate use, design, and signing and marking of traffic-calming measures. For local officials, developers, and community associations, it is an introduction to the goals and tactics of traffic calming. Based in part on the first traffic-calming manual taken through a formal rule-making process and adopted by a state department of transportation as a supplement to its roadway design manual, this book catalogs principles that have been modified by many local jurisdictions to match local priorities and preferences. Standardization is key to the success of traffic-calming initiatives, and this book explains the processes, tools, and design needed to create a standard traffic-calming program. It also shows how municipalities can build needed flexibility into such programs. Signage and markings are also key, and a chapter is devoted to these issues. This is the book that states and municipalities need to create effective traffic-calming programs.
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 publication provides comprehensive advice on the use of traffic calming measures, covering the relevant legislation, design, effectiveness and installation. As well as examining general considerations it examines each of the methods of traffic calming and their background, cost and maintenance, effectiveness and environmental impact.
This guide is intended to provide information on how to identify safety and mobility needs for pedestrians with the roadway right-of-way. Useful for engineers, planners, safety professionals and decision-makers, the guide covers such topics as: the Walking Environment including sidewalks, curb ramps, crosswalks, roadway lighting and pedestrian over and under passes; Roadway Design including bicycle lanes, roadway narrowing, reducing the number of lanes, one-way/two-way streets, right-turn slip lanes and raised medians; Intersections with roundabouts, T-intersections and median barriers; and Traffic calming designs.
Abstract: The main goal of the research described in this report was to evaluate countermeasures that agencies can use to reduce speeds as drivers enter rural communities located on high-speed roadways. The objectives of this study were as follows: - Identify and summarize countermeasures used to manage speeds in transition zones; - Demonstrate the effectiveness of countermeasures that are practical for high- to low-speed transition zones; - Acquire additional information about countermeasures that may show promise but lack sufficient evidence of effectiveness; - Develop an application toolbox to assist small communities in selecting appropriate transition zones and effective countermeasures for entrances to small rural communities. The team solicited small communities that were interested in participating in the Phase II study and several communities were also recommended. The treatments evaluated were selected by carefully considering traffic-calming treatments that have been used effectively in other countries for small rural communities, as well as the information gained from the first phase of the project. The treatments evaluated are as follows: - Transverse speed bars; - Colored entrance treatment; - Temporary island; - Radar-activated speed limit sign; - Speed feedback sign; The toolbox publication and four focused tech briefs also cover the results of this work.