This paper focuses on characteristics and progress in research of four lane road tunnel. Some key technological problems to be studied are pointed out.

但由于四车道公路隧道的建设在国内尚处于起步阶段，有许多问题亟待研究。

youdao

In another, our guess was that he was passed out (a peasant, on a four-lane rural highway in Yunnan), but on a road so busy that he was certain eventually to be hit.

另外一次，我们的猜测是他昏过去了(一个农民，在云南的一个四车道的乡间高速路上)，但是在一个车这么多的路上他肯定要被撞的。

youdao

But when he reached a four-lane highway with gentle curves, good visibility and little traffic, "I just about fell asleep and ran off the road... Lulled by safety, I'd acted more dangerously."

但是当他行至一条笔直的4车道，两旁风光旖旎，路上车辆很少，“那时我几乎快睡着了，差点驶下公路……我被安全感骗了，那让我的驾驶更不安全。”

youdao

The double-lane road had been converted into a four-lane road with all traffic moving in one direction.

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"ITS costs less than one percent of the investment necessary to build a four-lane road, " Moon said.

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They went over one more fence, walked around a parking lot, picked their way through some woods, and emerged onto a four-lane road.

NEWYORKER: Hellhole