From dusk to dawn, be sure your _____ are always turned on.

Study for the Commercial Driver’s License (CDL) Test. Focus on key concepts and sample questions, each with explanations. Prepare to ace your exam!

Multiple Choice

From dusk to dawn, be sure your _____ are always turned on.

Explanation:
When visibility is low, you need lighting that helps you see the road and makes your vehicle visible to others. Headlights provide forward illumination and make you easier to spot, which is why they should be on from dusk to dawn. Four-way flashers are for signaling hazards or a stopped vehicle and don’t illuminate the road ahead, so they don’t replace headlights. Turn signals indicate planned turns or lane changes and aren’t meant to stay on all the time, which would confuse other drivers. Brake lights only come on when you brake, so they don’t help with visibility when you’re not braking.

When visibility is low, you need lighting that helps you see the road and makes your vehicle visible to others. Headlights provide forward illumination and make you easier to spot, which is why they should be on from dusk to dawn. Four-way flashers are for signaling hazards or a stopped vehicle and don’t illuminate the road ahead, so they don’t replace headlights. Turn signals indicate planned turns or lane changes and aren’t meant to stay on all the time, which would confuse other drivers. Brake lights only come on when you brake, so they don’t help with visibility when you’re not braking.

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