When you've got speed limits, this creates situations that actually present dangers on the road.

当你达到速度限制时会遇到道路上的危险情况。

youdao

Yet the policy prescriptions are simple and proven: enforced speed limits, helmet laws for those on two wheels, good road design and more driving tests.

其实，从政策层面对预防交通事故是很简单的，而且颇见成效，比如限速、规定骑乘两轮车的人员必须戴上头盔、改善道路设计以及增加驾驶考试次数等等。

youdao

There are no speed limits on the road to excellence.

迈向卓越之路并无速度限制。

youdao

It creates a bus lane on the hard shoulder and uses sensors in the road to detect when mandatory speed limits should be varied to help traffic flow.

BBC: New system to cut traffic jams in Fife

Policing was at the top but road safety, powers over speed and drink driving limits, ports, licensing of alcohol and light night entertainment were there too.

BBC: Shopping lists and top tables

Speed limits are heavily researched controls meant to reduce road fatalities and accommodate for road conditions.

FORBES: The High Price Of Speeding