At the same time, more roads will be built and the underground will be added, reducing heavy traffic.

与此同时，将有更多的道路和地下层建成，减少交通拥挤。

youdao

You have some people who are working all the heavy traffic all the time and other people working hardly any traffic, and that doesn't make for good controllers, in terms of keeping up the proficiency.

这么做会导致有人总在交通高峰期工作而另一些人只在交通闲期工作，那样对控制员不好，不利于保持他们的效率。

youdao

There might be a delay in getting the reply after you sent your e-mail due to heavy network traffic or outages at some point of time.

在发送电子邮件后，因某时刻的网络流量过大或者断电，很可能会导致回复延迟。

youdao

The American Heart Association recommends reducing time spent in heavy traffic or jogging during rush hour, or near busy roadways and better treatment for cardiovascular risk factors.

VOA: standard.2010.08.04

From Monday the timetable will change to allow for the extra time drivers need during heavy traffic.

BBC: Jersey's bus company in timetable blunder