Asphalt treated base is widely used in heavy road and express-highway, as it has superior pavement performance.

沥青稳定碎石基层由于其优良路用性能，使其在重载道路、高速公路上得到了广泛应用。

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Heavy traffic blocked the road.

拥挤的车辆阻塞了道路。

《新英汉大辞典》

Two weeks ago, on a hot summer afternoon, I was about to cross a little busy road when I noticed an old grandpa with a heavy bag on his back just a few meters from me.

两周前，一个炎热的夏天的下午，我正要穿过一条有点繁忙的马路，这时我注意到一位背着一个沉重的包的老爷爷就在离我几米远的地方。

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The organization's recent State of the Air 2012 report found that California is home to many of the country's most polluted cities, with Los Angeles continuing to top the list of ozone-polluted cities thanks to its heavy road traffic and trade ports.

CNN: Smog-eating tiles gobble up air pollution

An emergency closure of Jiggers Bank in Ironbridge took place after rocks fell onto the road following heavy rain.

BBC: Ironbridge Jiggers Bank road closed until June

Jiggers Bank, in Ironbridge, has been closed since Tuesday night when rocks fell onto the road after heavy rain.

BBC: Ironbridge Jiggers Bank road remains closed