Transportation Licensing Center (TLC) Guam PSA Practice Test 2026 – The All-in-One Guide to Master Your Exam!

Headlights can be turned off one hour after sunset, as this is a common guideline based on the principle of ensuring visibility and safety while driving. The law typically requires that headlights be used from sunset until sunrise, as well as during inclement weather or when visibility is limited. Turning off headlights immediately after sunset does not account for diminishing light conditions that may still exist, which can impact a driver's ability to see or be seen.

Choosing to turn off headlights once visibility improves may lead to unsafe driving situations, as lighting conditions can vary significantly during twilight. Although it is essential to use judgment in adjusting the use of headlights based on current visibility, the safest standard is to keep them on until the designated time of one hour after sunset. Therefore, the rule encourages safety and proper visibility assurance for all drivers on the road.