TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 432: Recent Roadway Geometric Design Research for Improved Safety and Operations reviews and summarizes roadway geometric design literature completed and published from 2001 through early 2011, particularly research that identified impacts on safety and operations.
The report is structured to correspond to chapters in the American Association of State Highway and Transportation Officials’ A Policy on Geometric Design of Highways and Streets, more commonly referred to as the Green Book.
NCHRP Synthesis 432 is an update of NCHRP Synthesis 299 on the same topic published in 2001.
National Academies of Sciences, Engineering, and Medicine. 2012. Recent Roadway Geometric Design Research for Improved Safety and Operations. Washington, DC: The National Academies Press. https://doi.org/10.17226/14661.
|Chapter One - Introduction||4-5|
|Chapter Two - Design Controls and Criteria||6-11|
|Chapter Three - Elements of Design||12-19|
|Chapter Four - Cross-Section Elements||20-34|
|Chapter Five - Intersections||35-57|
|Chapter Six - Interchanges||58-64|
|Chapter Seven - Conclusions||65-72|
|Abbreviations used without definitions in TRB publications||81-81|
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