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Texas Car / Permit practice question · Sharing the Road

You are following a tractor-trailer at night. Why should you switch to low beams?

Answer choices

  • Bright light bouncing off the truck's large side mirrors blinds its driver— Correct answer
  • Low beams keep your own dashboard from reflecting
  • High beams shorten the distance the truck needs to stop
  • State law bans high beams on any road trucks use

Why this is the answer

When you follow a truck at night, dim your headlights. Bright lights from a vehicle behind reflect off the truck's large side mirrors and blind the driver. That is the reason, not your dashboard or a stopping-distance rule. Dimming lets the driver see well enough to watch the road, and you are expected to keep a safe distance.

Source: Texas Driver Handbook — Sharing the Road with Trucks

Content reviewed against official driver handbooks · August 12, 2026

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