AASHTO |
American Association of State Highway and Transportation Officials |
ENV |
Enhanced Night Visibility |
FHWA |
Federal Highway Administration |
GPS |
Global Positioning System |
ITS |
Intelligent Transportation Systems |
SUV |
sport utility vehicle |
UV |
ultraviolet |
UV–A |
ultraviolet A (wavelength 315 to 400 nanometers) |
VDOT |
Virginia Department of Transportation |
VES |
vision enhancement system |
VTRC |
Virginia Transportation Research Council |
cpd |
cycles per degree |
PCLA |
percentage of contrast left eye line A (line A represents 1.5 cpd) |
PCRA |
percentage of contrast right eye line A (line A represents 1.5 cpd) |
PCLB |
percentage of contrast left eye line B (line B represents 3.0 cpd) |
PCRB |
percentage of contrast right eye line B (line B represents 3.0 cpd) |
PCLC |
percentage of contrast left eye line C (line C represents 6.0 cpd) |
PCRC |
percentage of contrast right eye line C (line C represents 6.0 cpd) |
PCLD |
percentage of contrast left eye line D (line D represents 12.0 cpd) |
PCRD |
percentage of contrast right eye line D (line D represents 12.0 cpd) |
PCLE |
percentage of contrast left eye line E (line E represents 18.0 cpd) |
PCRE |
percentage of contrast right eye line E (line E represents 18.0 cpd) |