Download PDF version (31.3k) The full article is available as a free PDF document.
In an attempt to attract the "other guy's" attention to avoid accidents, fleet managers might establish a company policy requiring drivers to keep vehicle lights on during daytime hours. Research indicates that vehicles with daytime operating lights had approximately 38% fewer front and side two-vehicle collisions. Experts have found that when headlights are on, vehicles are visible at a distance of about 4,700 feet, compared with 2,000 feet when headlights are off. One immediate way to enact a daytime light operating program would be to require drivers to switch on low-beam headlights at the start of every trip. But the driver has to remember to turn the lights on, and there is a decrease in bulb life. The best alternative is a reduced-intensity, low-beam kit that turns on the headlights (at reduced voltage) when the engine is running and the master light switch is off. The kit reduces the daytime lighting voltage. Reducing the voltage by 10% reportedly increases bulb life about five-fold while reducing light intensity by only one-third. keywords: headlight, safety, truck