When entering a tunnel during the day, as long as there is lighting inside, there is no need to turn on the headlights.

ANSWER · B

During the day, light outside a tunnel is bright while light inside is relatively dim. There is a dark adaptation period when entering, which can affect the driver's judgment of road conditions. Turning on headlights helps see the road and alerts other vehicles. Therefore, regardless of the tunnel's lighting, headlights should be on.

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