Inclement Weather Conditions

The essential problem with forward lighting while driving in inclement weather is that of reflected light from snow, rain and fog particles toward the vehicle driver. This reflected light decreases visibility by reducing contrast and by contributing to glare that can lead to fatigue and thus to a higher likelihood of accidents

relevant factors in visibility and distraction
- light source mounting location
- aiming angle
- beam spread
- spectral power distribution (colour)

Further information on the factors in this file
www.lrc.rpi.edu/programs/transportation/pdf/PAL/PAL2001-bullough.pdf