How many vehicles were involved in the accident?

这次交通事故涉及多少辆汽车？

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This alarm could disperse down the chain of vehicles in a relay so they could safely stop a long way before they reach the accident spot.

警报信息会通过互联网汽车以接力的方式传播，这样就可以确保其他车辆安全停靠在距离事故地点较远的安全地带。

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The driverless car had an accident February 14 in California. The accident was reported to the Department of Motor Vehicles in California February 23.

该无人驾驶汽车2月14日在加州发生了一场交通事故。这起事故于2月23日上报到了加州的汽车部门。

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"As electric vehicles enter the marketplace in greater numbers, it's an appropriate time to recognize best practices that facilitate a safe response when these vehicles are in an accident, " said Todd Mackintosh, chairman of the SAE technical committee that issued the report earlier this month.

CNN: STORY HIGHLIGHTS

Toyota said it sympathised with anyone in an accident involving one of its vehicles, but said it stood behind the safety and integrity of its electronic throttle control system.

BBC: Toyota settles fatal crash lawsuit

And while most traffic jams are a result of an accident or too many vehicles (or data packets in the case of the Internet) legitimately trying to get from place to place, they can also be slowed down deliberately, as happened in Brussels last September when about 100 trucks slowed traffic entering the city as part of a planned protest.

FORBES: Dealing with Spam and Cyberattacks: Control Vs. Openness