At the same time, more roads will be built and the underground will be added, reducing heavytraffic.
与此同时,将有更多的道路和地下层建成,减少交通拥挤。
2
You have some people who are working all the heavytraffic 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.