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1. The free flow tunnel is a crucial component in the design of the new highway.
自由流动隧道是新高速公路设计中至关重要的组成部分。
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2. The free flow tunnel helps to reduce traffic congestion and improve air quality.
自由流动隧道有助于减少交通拥堵和改善空气质量。
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3. The free flow tunnel is designed to allow vehicles to pass through without stopping or slowing down.
自由流动隧道的设计是为了允许车辆通过而无需停车或减速。