They were travelling at a speed that was double the legal limit.

他们正以两倍于法定限速的速度行驶。

《牛津词典》

The "black box" recorder on a train that derailed in Australia injuring more than 100 passengers this week showed it was travelling at almost twice the speed limit when the accident occurred.

11月17日，澳大利亚警方找到了于16日在澳大利亚昆士兰州发生脱轨倾覆事故的一高速列车上的黑匣子。 黑匣子记录表明，事故发生时，列车的行驶速度几乎超过限制时速的两倍。

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Based on result of calculation, proposal is made to limit the maximum travelling speed of the crane and the speed with which the crane can run on a curve with small radius.

根据计算结果对该起重机最高行驶速度和通过小半径曲线的速度限制提出了建议。

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Police say he was travelling at twice the speed limit when he hit a taxi carrying Nachman and Raizy Glauber, both 21, on Sunday in Brooklyn.

BBC: Julio Acevedo arrested over New York hit-and-run deaths

Sgt Martyn Bougourd, a police collision investigation officer, said he calculated that the quad bike had been travelling at 32mph, within the 35mph speed limit for the road.

BBC: Guernsey girl's quad bike death ruled accidental

Drivers travelling at up to 30kph above the 120kph (75mph) speed limit on motorways generally get away with it.

ECONOMIST: Will new rules make Spanish drivers less dangerous?