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Publication Number: FHWA-HRT-04-145
Date: December 2005

Enhanced Night Visibility Series, Volume XIV: Phase III—Study 2: Comparison of Near Infrared, Far Infrared, and Halogen Headlamps on Object Detection in Nighttime Rain

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LIST OF ACRONYMS AND ABBREVIATIONS


General Terms

BATTM Brightness Acuity Tester
ENV Enhanced Night Visibility
LED light emitting diode
NHTSA National Highway Traffic Safety Administration
SUV sport utility vehicle
UV–A ultraviolet A (wavelength 315 to 400 nanometers)
VES vision enhancement system
VMT vehicle miles traveled

Vision Enhancement Systems

HLB halogen (i.e., tungsten-halogen) low beam
HLB–LP halogen low beam at a lower profile
HID high intensity discharge

Statistical Terms

ANOVA analysis of variance
DF degrees of freedom
F value F-ratio
MS mean square
N sample size
P value statistical significance
SNK Student-Newman-Keuls test
SS sums of squares

Measurements

delta symbol lux calculated change in illuminance at the driver’s eye
cd candela
cd/m2 candela per square meter
cm centimeters
D degrees down
fL footlamberts
ft feet
km/h kilometers per hour
L degrees left
lm lumens
lx lux
m meters
mi miles
mi/h miles per hour
min minutes
ms milliseconds
nm nanometers
R degrees down
s seconds
U degrees up
V volts
W Watts

 

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