ICBC Class 4 Commercial Driver's Licence (CDL) Practice Test

Using low-beam headlights is essential in specific driving conditions to enhance safety and visibility. In fog, rain, and when it is nighttime with other vehicles present, low-beam headlights strike the right balance in improving visibility without causing glare for other drivers. When driving in fog or heavy rain, high beams can reflect off the moisture in the air, creating a more challenging environment due to increased glare, thereby reducing your overall visibility. Low beams produce a focused beam of light that illuminates the road directly in front of you, which is crucial in such adverse weather conditions. Similarly, at night, when other vehicles are present, low SAMPLEbeams prevent blinding oncoming traffic while still allowing you to see well enough to navigate safely. This practice is key to ensuring everyone's safety on the road.