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Publication Number: FHWA-HRT-04-144
Date: December 2005

Enhanced Night Visibility Series, Volume XIII: Phase III—Study 1: Comparison of Near Infrared, Far Infrared, High Intensity Discharge, and Halogen Headlamps on Object Detection in Nighttime Clear Weather

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LIST OF ACRONYMS AND ABBREVIATIONS


General Terms

CAD computer-aided design
ENV Enhanced Night Visibility
FOV field of view
HHD high head down
HUD heads-up display
IP instrument panel
IR infrared
OCH optical center height
OEM original equipment manufacturers
SAE Society of Automotive Engineers
SUV sport utility vehicle
UV–A ultraviolet A (wavelength 315 to 400 nanometers)
VES vision enhancement system
VOA visually optically aligned
VOL visually optically aligned left
VOR visually optically aligned right

Vision Enhancement Systems

FIR far infrared vision system
HID high intensity discharge
HLB halogen (i.e., tungsten-halogen) low beam
NIR near infrared vision system

Objects

BlackLF pedestrian, black clothing, left
BlackRT pedestrian, black clothing, right
BloomLF bloom object, left (denim clothing)
BloomRT bloom object, right (denim clothing)
BlueLF pedestrian, denim clothing, left
BlueRT pedestrian, denim clothing, right
FOALT far off axis left (denim clothing)
FOART far off axis right (denim clothing)
LFtrnLF pedestrian in left turn, left side (denim clothing)
LFtrnRT pedestrian in left turn, right side (denim clothing)
RRPM raised retroreflective pavement marker
RTtrnLF pedestrian in right turn, left side (denim clothing)
RTtrnRT pedestrian in right turn, right side (denim clothing)

Statistical Terms

ANOVA analysis of variance
DF degrees of freedom
F value F-ratio
MS mean square
p value statistical significance
SD standard deviation
SE standard error
SNK Student-Newman-Keuls
SS sums of squares

Measurements

C Celsius
cm centimeters
F Fahrenheit
ft feet
ft/inches feet per inches
h hours
km kilometers
km/h kilometers per hour
m meters
m/cm meters per centimeter
mi miles
mi/h miles per hour
mm millimeters
s seconds

Stopping Distance

BRT braking reaction time
d distance
dBD braking distance
f coefficient of friction
g acceleration
G gradient
V velocity

Contrast Sensitivity

cpd cycles per degree
PCLA percentage of contrast left eye line A (line A represents 1.5 cpd)
PCLB percentage of contrast left eye line B (line B represents 3.0 cpd)
PCLC percentage of contrast left eye line C (line C represents 6.0 cpd)
PCLD percentage of contrast left eye line D (line D represents 12.0 cpd)
PCLE percentage of contrast left eye line E (line E represents 18.0 cpd)
PCRA percentage of contrast right eye line A (line A represents 1.5 cpd)
PCRB percentage of contrast right eye line B (line B represents 3.0 cpd)
PCRC percentage of contrast right eye line C (line C represents 6.0 cpd)
PCRD percentage of contrast right eye line D (line D represents 12.0 cpd)
PCRE percentage of contrast right eye line E (line E represents 18.0 cpd)

 

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