Although glare is not the number one cause of automobile accidents, it is a prevalent cause.
of glare, whether from oncoming headlamps or sunlight, obstructs the driver's
vision. It can take an average, middle-aged person's eyes
six to seven seconds to adjust to glare from oncoming traffic. If you
were traveling down a simple two-lane road at 40 mph. In six to seven seconds,
you and your vehicle would have traveled between 354 and 414 feet. In that amount
of space and time, serious automobile damage could easily occur. Vision
is also effected by age. As a person ages, his ability to focus
and recover from glare continues to diminish.
compiled from police-reported crashes (2000-2003) was analyzed by the National Highway
Traffic Safety Association (NHTSA). Variables studied were sex, age, travel
speed, maneuver, crash hour, flow of traffic, number of lanes, roadway
profile, and vehicle role. This data showed a positive correlation with
glare - caused by bright sunlight, headlights, or reflected glare. Our
National Critical Technology's technical application
was purposed to diminish or eliminate these types of dangerous glare.
The conclusion of the report states that
what is needed is a common approach to both headlamp and sunlight glare and develop
counter measures to reduce glare before it strikes drivers' eyes.
This correlation led to the NHTSA agreeing in 2003-2004 that moderating the glare of
headlamps as well as from the sun would greatly reduce the number of traffic altercations
caused by high-mounted headlamps on trucks, headlamps with High Intensity Discharge
(HID) bulbs and other fog lamps mounted on the front of vehicles. The conclusion was that remedying glare-based visibility issues should become one
In 2005 over
900 accidents in Kentucky alone were caused by glare. Most state traffic
accident reports, including Florida and Washington, have a place on their reports
indicating whether or not glare was a significant, contributing factor.