Unverified50% confidenceFactExact time

Ultra-long highway tunnels usually adopt a scheme combining longitudinal ventilation and transverse ventilation, and are equipped with real-time air quality monitoring systems.

1

Sources

50%

Confidence

Long-term

Relevance

10/12/2026

First Seen

Sources

What Are the Engineering Highlights of America's Longest Highway Tunnel?

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纵向通风concept 横向通风concept 实时空气质量监测系统concept

Related Claims

UnverifiedIn ultra-long highway tunnels, cross passages are usually set every 250 to 500 meters, connecting the main tunnel with a parallel pilot tunnel or adjacent tunnel tubes.65% similar

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