10.2: Roadside Design Guide, 4th Edition
The Roadside Design Guide presents a synthesis of current information and operating practices related to roadside safety and is written in dual units—metric and U.S. Customary.
Paved Shoulder
Pg 10-21: Bikeway Selection Guide
This document is a resource to help transportation practitioners consider and make informed decisions about tradeoffs relating to the selection of bikeway types. This report highlights linkages between the bikeway selection process and the transportation planning process. This guide presents these factors and considerations in a practical processoriented way. It draws on research where available and emphasizes engineering judgment, design flexibility, documentation, and experimentation.
Pg 41-44: Achieving Multimodal Networks: Applying Design Flexibility and Reducing Conflicts
Multimodal transportation networks provide access to jobs, education, health care, recreation, transit, and other essential services in urban, suburban, and rural areas throughout the United States. Interconnected pedestrian and bicycle infrastructure makes walking and bicycling a viable transportation choice for everyone and this contributes to the health, equity, and quality of life of our communities. This publication is a resource for practitioners seeking to build multimodal transportation networks.
Search: Roadway: Crash Modification Factors Clearinghouse
A crash modification factor (CMF) is a multiplicative factor used to compute the expected number of crashes after implementing a given countermeasure at a specific site. The Crash Modification Factors Clearinghouse houses a Web-based database of CMFs along with supporting documentation to help transportation engineers identify the most appropriate countermeasure for their safety needs. Using this site, you can search to find CMFs or submit your own CMFs to be included in the clearinghouse.
4.4: A Policy on Geometric Design of Highways and Streets, 6th Edition
A Policy on Geometric Design of Highways and Streets, 6th Edition, 2011, commonly referred to as the “Green Book,” contains the current design research and practices for highway and street geometric design. The document provides guidance to highway engineers and designers who strive to make unique design solutions that meet the needs of highway users while maintaining the integrity of the environment. It is also intended as a comprehensive reference manual to assist in administrative, planning, and educational efforts pertaining to design formulation.
Pg 14-18: NCHRP Report 783: Evaluation of the 13 Controlling Criteria for Geometric Design
"In 1985, the FHWA designated 13 specific design elements as controlling criteria for roadway design (see Mitigation Strategies for Design Exceptions). The 13 controlling criteria are (1) design speed, (2) lane width, (3) shoulder width, (4) bridge width, (5) structural capacity, (6) horizontal alignment, (7) vertical alignment, (8) grade, (9) stopping sight distance, (10) cross slope, (11) superelevation, (12) vertical clearance, and (13) horizontal clearance.
Pg 6-9: Pedestrian Countermeasure Policy Best Practice Report
Safety is the number one priority for the U.S. Department of Transportation (USDOT) and it's the agency's policy to provide safe and effective pedestrian accommodation wherever possible. The Federal Highway Administration (FHWA) encourages the use of specific proven pedestrian safety countermeasures that can help achieve local, State and National safety goals.
Pg 79-84: Implementing Bicycle Improvements at the Local Level
This implementation manual is intended for local governments who want to make improvements to existing conditions that affect bicycling. Thirteen of the most typical situations or factors that impact bicycle use are considered. For each situation or factor the manual provides (as appropriate) a problem overview, a solution overview, implementation strategies, objectives, resource requirements, subtasks, a schedule, specifications, and references.
Chapter 4.5: Guide for the Development of Bicycle Facilities, 4th Edition
This guide provides information on how to accommodate bicycle travel and operations in most riding environments. It is intended to present sound guidelines that result in facilities that meet the needs of bicyclists and other highway users. Sufficient flexibility is permitted to encourage designs that are sensitive to local context and incorporate the needs of bicyclists, pedestrians, and motorists. However, in some sections of this guide, suggested minimum dimensions are provided.
Volume 1;3-22 to 3-25: Highway Capacity Manual (HCM), 5th Edition
The Transportation Research Board's (TRB) fifth edition of the Highway Capacity Manual (HCM 2010), incorporates results from more than $5 million of research completed since the publication of the HCM2000. This latest edition significantly updates the methodologies that engineers and planners use to assess the traffic and environmental effects of highway projects.