Calibration and Development of State-DOT-Specific Safety Performance Functions (2024)
Chapter: Key Acronyms and Abbreviations
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Suggested Citation:
"Key Acronyms and Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2024. Calibration and Development of State-DOT-Specific Safety Performance Functions. Washington, DC: The National Academies Press.
doi: 10.17226/27906.
Key Acronyms and Abbreviations
| A | Crash resulting in incapacitating injuries |
| AADT | Annual average daily traffic |
| AF | Adjustment factor |
| AIC | Akaike information criterion |
| B | Crash resulting in non-incapacitating injuries |
| BIC | Bayesian information criterion |
| C | Crash resulting in possible/non-evident injuries |
| CF | Calibration factor |
| CMF | Crash modification factor |
| CURE | Cumulative residuals |
| DOT | Department of Transportation |
| FI | Fatal + injury |
| HSM/HSM1 | 1st edition of the Highway Safety Manual |
| HSM2 | 2nd edition of the Highway Safety Manual |
| K | Crash involving a fatality |
| KABCO | Commonly used crash injury severity scale |
| MAD | Mean absolute deviation |
| MAE | Mean absolute error |
| MPO | Metropolitan planning organization |
| MSPE | Mean squared prediction error |
| NB | Negative binomial |
| O | Crash resulting in no indication of injury or property damage-only crashes |
| OLS | Ordinary least squares |
| PDO | Property damage only |
| RMSE | Root mean square error |
| SPF | Safety performance function |
| TWLTL | Two-way left-turn lane |
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