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Pedestrian and Bicycle Safety Performance Functions (2023)

Chapter: Abbreviations and Acronyms

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Page 297
Suggested Citation:"Abbreviations and Acronyms." National Academies of Sciences, Engineering, and Medicine. 2023. Pedestrian and Bicycle Safety Performance Functions. Washington, DC: The National Academies Press. doi: 10.17226/27294.
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Page 297
Page 298
Suggested Citation:"Abbreviations and Acronyms." National Academies of Sciences, Engineering, and Medicine. 2023. Pedestrian and Bicycle Safety Performance Functions. Washington, DC: The National Academies Press. doi: 10.17226/27294.
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Page 298
Page 299
Suggested Citation:"Abbreviations and Acronyms." National Academies of Sciences, Engineering, and Medicine. 2023. Pedestrian and Bicycle Safety Performance Functions. Washington, DC: The National Academies Press. doi: 10.17226/27294.
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Page 299
Page 300
Suggested Citation:"Abbreviations and Acronyms." National Academies of Sciences, Engineering, and Medicine. 2023. Pedestrian and Bicycle Safety Performance Functions. Washington, DC: The National Academies Press. doi: 10.17226/27294.
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Page 300

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297   Three tables of abbreviations and acronyms are presented: general terms, crash severity scales and levels, and roadway types. Abbreviations and Acronyms General Terms Description AADB Annual average daily bicyclists AADP Annual average daily pedestrians AADT Annual average daily traffic AASHTO American Association of State Highway and Transportation Officials AF Adjustment factor AMS Asset management system Base cond. Base condition Bike ISI Bicycle Intersection Safety Index BIKESAFE An online system designed to assist practitioners with the selection of countermeasures to improve bicyclist safety and mobility CMF Crash modification factor CODES Crash Outcome Data Evaluation System CRF Conditional Random Forest CycleRAP Model developed to assess the crash potential of bicyclists and light mobility vehicle users on roads and other facilities DVRPC Delaware Valley Regional Planning Commission EB Empirical Bayes EDT Estimated daily traffic GIS Geographic information system GLM Generalized linear model HSIS Highway Safety Information System HSM Highway Safety Manual (first edition) HSM2 Highway Safety Manual (second edition) iRAP International Road Assessment Programme IRB Institutional review board ISW8 Injury Surveillance Workshop 8 ITE Institute of Transportation Engineers ITRE Institute for Transportation Research and Education LPI Leading pedestrian interval LTS Level of traffic stress MDOT Michigan Department of Transportation MnDOT Minnesota Department of Transportation MPO Metropolitan planning organizations N/A Not applicable NAICS North American Industry Classification System NCDOT North Carolina Department of Transportation NHTS National Household Travel Survey NHTSA National Highway Traffic Safety Administration NSI Network safety index NTP Nonmotorized Transportation Pilot Program ODOT Oregon Department of Transportation Ped ISI Pedestrian Intersection Safety Index PEDSAFE An online system designed to assist practitioners with the selection of countermeasures to improve pedestrian safety and mobility PHB Pedestrian hybrid beacon RAP Road Assessment Program RRFB Rectangular rapid flashing beacon

298 Pedestrian and Bicycle Safety Performance Functions General Terms SPF Safety performance function SRIP Safer Roads Investment Plan Std. Dev. Standard deviation Std. Error Standard error SWOV Dutch Institute for Road Safety Research TLC Transit for Livable Communities TMG Traffic Monitoring Guide TransPed Interactive GIS-based tool designed to assist in the planning and analysis of pedestrian and bicycle transportation usRAP U.S. Road Assessment Program ViDA Software for application of RAP models Description Crash Severity Scales and Levels FI Fatal-and-injury severity levels FS Fatal and suspected serious injury crashes KABCO KABCO scale corresponds to the severity of the injuries as assessed by law enforcement responding to investigate the scene K Fatal injury severity level A Suspected serious injury severity level B Suspected minor injury severity level C Possible injury severity level O Property-damage-only severity level MAIS Modified Abbreviated Injury Scale PDO Property-damage-only severity level Description Roadway Types TWLTL Two-way left-turn lane 2U Two-lane undivided arterial 3T Three-lane arterial including a center two-way left-turn lane 4U Four-lane undivided arterial 4D Four-lane divided arterial including a raised or depressed median 5T Five-lane arterial including a center two-way left-turn lane 6D Six-lane divided arterial including a raised or depressed median 8D Eight-lane divided arterial including a raised or depressed median 1OW One-lane, one-way road 2OW Two-lane, one-way road 3OW Three-lane, one-way road OW One-way arterial 3ST Three-leg intersection with stop control on the minor-road approach 3SG Three-leg signalized intersection 4ST Four-leg intersection with stop control on the minor-road approaches 4SG Four-leg signalized intersection 3ST (2×2) Three-leg stop control intersection with two-way/two-way operations 3SG (2×2) Three-leg signal control intersection with two-way/two-way operations 4ST (2×2) Four-leg stop control intersection with two-way/two-way operations 4SG (2×2) Four-leg signal control intersection with two-way/two-way operations 4SG (1×2) Four-leg signal control intersection with one-way/two-way operations Description

Abbreviations and acronyms used without de nitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing America’s Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration GHSA Governors Highway Safety Association HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) NASA National Aeronautics and Space Administration NASAO National Association of State Aviation Officials NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffic Safety Administration NTSB National Transportation Safety Board PHMSA Pipeline and Hazardous Materials Safety Administration RITA Research and Innovative Technology Administration SAE Society of Automotive Engineers SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005) TCRP Transit Cooperative Research Program TEA-21 Transportation Equity Act for the 21st Century (1998) TRB Transportation Research Board TSA Transportation Security Administration U.S. DOT United States Department of Transportation

Transportation Research Board 500 Fifth Street, NW Washington, DC 20001 ADDRESS SERVICE REQUESTED ISBN 978-0-309-69903-7 9 7 8 0 3 0 9 6 9 9 0 3 7 9 0 0 0 0

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Each year, national crash studies have estimated that while overall traffic fatalities are decreasing, the percentages of those fatalities among pedestrians and cyclists are increasing.

NCHRP Research Report 1064: Pedestrian and Bicycle Safety Performance Functions, from TRB's National Cooperative Highway Research Program, presents state departments of transportation and other transportation professionals with an update of pedestrian and bicycle safety performance functions (SPFs).

Supplemental to the report are three spreadsheet tools that address SPFs on rural multilane roads, rural two-lane roads, and urban/suburban arterials.

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