You must drop your speed in built-up areas.

在房屋密集区必须放慢速度。

《牛津词典》

Aggressive drivers also caused speed to drop because they braked hard at the last moment to avoid driving into the car in front.They then had to drive more slowly to open up a space again.

激进的驾驶员也导致了交通速度的降低，因为他们最后一秒急刹车以避免撞到前面的车辆的时候，他们就会开得更慢以拉大跟车距离。

youdao

Aggressive drivers also caused speed to drop because they braked hard at the last moment to avoid driving into the car in front. They then had to drive more slowly to open up a space again.

激进的驾驶员也导致了交通速度的降低，因为他们最后一秒急刹车以避免撞到前面的车辆的时候，他们就会开得更慢以拉大跟车距离。

youdao

However, although the sea ice is shrinking -- covering less total area as well as becoming thinner -- the Arctic is still a world ruled by ice, a lesson well learned when the Polar Pioneer encountered heavy pack ice between Svalbard and the eastern coast of Greenland, forcing the captain to divert the boat and drop speed to just a few knots.

BBC: Life in the fragile, frozen Arctic

But in the winter, the number of journeys drop, the speed on the roads also drops, and voila!

FORBES: Why It's Actually Safer To Drive In The Winter

The company and analysts say the drop in data speed won't be as noticeable as a network switch on Verizon or Sprint.

WSJ: iPhone Will Stress-Test LTE Networks