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Roundabouts in the United States

This report presents methods of estimating the safety and operational impacts of roundabouts and updates design criteria for them.

Lane Widths, Channelized Right Turns, and Right-Turn Deceleration Lanes in Urban and Suburban Areas

This study examines design guidance or criteria addressing the safety and operational tradeoffs for motorists, pedestrians, and bicyclists on urban and suburban arterials and collectors with speeds of 45 mph or less.

Safety and Operational Characteristics of Two-Way Left Turn Lanes

The objective of this research was to evaluate the safety and operational characteristics of three-lane cross-sections with a TWLTL compared to four-lane undivided roadways.

Three Lane Conversions (Road Diets)

Resource summary from Community Design group examining conversion of existing four lane roads to three lanes to create more inviting pedestrian environments, calm traffic, and increase safety.

How Land Use and Transportation Systems Impact Public Health

This review discusses how urban form affects public health, specifically through the ways in which the built environment encourages or discourages physical activity levels.

Improving Pedestrian Safety at Unsignalized Crossings

A research project jointly sponsored by the TCRP and the NCHRP examining treatements for unsignalized pedestrian crossings.

Interim Report to the U.S. Congress on the Nonmotorized Transportation Pilot Program SAFETEA-LU Section 1807

This interim report to Congress summarizes the progress and initial results of the Federal Highway Administration's (FHWA) and the four pilot communities' participation in the Nonmotorized Transportation Pilot Program (NTPP) from its inception through May 2007.

Manual on Uniform Traffic Control Devices

The Manual on Uniform Traffic Control Devices, or MUTCD, defines the standards used by road managers nationwide to install and maintain traffic control devices on all streets and highways.

Special Report: Accessible Public Rights-of-Way Planning and Design for Alterations

The focus of this report is on improvement projects in the public right-of-way that are classified as alterations under the ADA.

United States Access Board

The Access Board is an independent Federal agency devoted to accessibility for people with disabilities. Created in 1973 to ensure access to federally funded facilities, the Board is now a leading source of information on accessible design.