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DDifficulty 2/5

A bus wider than 2.10 m travels through a signed tunnel, even during daylight. Must its end-outline marker lights be switched on?

Correct answer

Yes, also during daylight in the tunnel.

Yes, together with position lights and the required driving lights. Article 99 requires position lights in tunnels and end-outline marker lights when width exceeds 2.10 m. The requirement is not limited to night-time. End-outline lights show vehicle dimensions and do not replace dipped headlights or other required lighting; do not confuse width with length or height.

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All options

  • Yes, also during daylight in the tunnel.

  • No, end-outline lights are switched on only at night.

  • No, width does not affect this requirement.

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