General Knowledge · Night Driving and Driver Fatigue
Under 49 CFR 383.111(a)(11), federal regulation names specific vehicle-related factors a CDL knowledge test must cover for night driving. Which of the following is one of them?
Explanation
Federal regulation names headlights, auxiliary lights, turn signals, windshields, and mirrors as the vehicle-related factors a CDL knowledge test must cover under night operation, per 49 CFR 383.111(a)(11)(iii). These are the vehicle components most responsible for how well a driver can see and be seen after dark, which is why the regulation calls them out separately from general vehicle upkeep. Tire tread depth and air pressure, and engine oil and coolant level, are real pre-trip inspection items, but they fall under the separate vehicle-inspection required-knowledge topic at 383.111(a)(17), not this night-specific list. A GPS system has nothing to do with either topic, since it is not a safety-related vehicle factor under any CDL knowledge requirement.
Source: 49 CFR 383.111(a)(11)(iii)
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