Enhanced Night Visibility Series, Volume XI: Phase II—Cost-Benefit Analysis
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LIST OF ACRONYMS AND ABBREVIATIONS
General Terms
| ENV |
Enhanced Night Visibility |
| FHWA |
Federal Highway Administration |
| GES |
General Estimates System |
| GDP |
Gross Domestic Product |
| NASS |
National Automotive Sampling System |
| PDO |
property damage only |
| VDOT |
Virginia Department of Transportation |
| VTRC |
Virginia Transportation Research Council |
| VES |
vision enhancement system |
Vision Enhancement Systems
|
|
| three UV–A + HLB |
three UV–A headlamps together with halogen low beam |
| five UV–A + HLB |
five UV–A headlamps together with halogen low beam |
| HLB |
halogen (i.e., tungsten-halogen) low beam |
| Hybrid UV–A + HLB |
hybrid UV–A/visible output together with halogen low beam |
| IR–TIS |
infrared thermal imaging system |
| UV–A |
ultraviolet A (wavelength 315 to 400 nanometers) |
Cost and Benefit Computations
| b |
constant |
| CMF |
crash modification factor |
| CR |
crash rate |
| f |
coefficient of friction |
| G |
grade |
| m |
constant |
| S |
stopping distance |
| t |
time between perception and reaction |
| u |
velocity |
| x |
year |
| y |
forecast quantity |
Measurements
| ft |
feet |
| km |
kilometers |
| lf |
linear feet |
| lm |
linear meter |
| m |
meters |
| mi |
miles |
|
