National Academies Press: OpenBook

Application of Crash Modification Factors for Access Management, Volume 2: Research Overview (2021)

Chapter: Abbreviations, Acronyms, Initialisms, and Symbols

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Page 211
Suggested Citation:"Abbreviations, Acronyms, Initialisms, and Symbols." National Academies of Sciences, Engineering, and Medicine. 2021. Application of Crash Modification Factors for Access Management, Volume 2: Research Overview. Washington, DC: The National Academies Press. doi: 10.17226/26162.
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Page 211
Page 212
Suggested Citation:"Abbreviations, Acronyms, Initialisms, and Symbols." National Academies of Sciences, Engineering, and Medicine. 2021. Application of Crash Modification Factors for Access Management, Volume 2: Research Overview. Washington, DC: The National Academies Press. doi: 10.17226/26162.
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Page 212

Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

199 A B B R E V I A T I O N S , A C R O N Y M S , I N I T I A L I S M S , A N D S Y M B O L S A incapacitating injury AADT annual average daily traffic AASHTO American Association of State Highway and Transportation Officials B non-capacitating injury C possible injury C calibration factor for the PSF of a given facility type CMF crash modification factors and functions CMF1, CMF2, …, CMFN Values of Highway Safety Manual (1st Edition) CMFs Cnty_FRA Franklin County CountyCd County code CURE cumulative residual CV coefficient of variation DCMF Development of Crash Modification Factors DOT department of transportation f(AM) function representing the relationship between crashes and the access management related variable(s) FHWA Federal Highway Administration ft feet GIS geographic information system GLM generalized linear regression modeling HSIP Highway Safety Improvement Program Intercept constant term to account for differences between the data used for this project and the original data used to develop the Highway Safety Manual (1st Edition) SPFs ITE Institute of Transportation Engineers K fatal injury KABC injury crashes KML Keyhole Markup Language LogRound major route milepost MAD mean absolute deviation MajRoute major route MinRoadName minor road name MP Milepost Mph miles per hour MPO metropolitan planning organizations MV multi-vehicle NACE National Association of County Engineers NCHRP National Cooperative Highway Research Program NJDOT New Jersey Department of Transportation O no injury RCUT restricted crossing U-turn RIRO right-in, right-out RTOR right-turn-on-red SPF safety performance functions

200 SR State route SV single-vehicle TRB Transportation Research Board TWLTL two-way left-turn lane Var variance of ratio of two random variables (or the CMF in this case) x random variable representing an independent CMF y random variable representing an independent CMF 2U two-lane undivided 3SG three-legged signalized 3ST three-legged stop-controlled 3T two-lane with TWLTL 4D four-lane divided 4SG four-legged signalized 4ST four-legged stop-controlled 4U four-lane undivided 5T four-lane with TWLTL

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The 1st Edition, in 2010, of the AASHTO Highway Safety Manual revolutionized the transportation engineering practice by providing crash modification factors and functions, along with methods that use safety performance functions for estimating the number of crashes within a corridor, subsequent to implementing safety countermeasures.

The TRB National Cooperative Highway Research Program's pre-publication draft ofNCHRP Research Report 974: Application of Crash Modification Factors for Access Management, Volume 2: Research Overview documents the research process related to access management features.

Supplementary to the report is the pre-publication draft of NCHRP Research Report 974: Application of Crash Modification Factors for Access Management, Volume 1: Practitioner’s Guide and a summary presentation for the two volumes.

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