As with the suburban line on which last week's crash occurred, drivers complain that safety systems are not fully operational.

就拿上周发生撞车事件的郊区线路来说，驾驶员们就在抱怨，说安全系统并没有完全处于正常运转状态。

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With its OnStar safety communications systems a part of the car, "GM knows real time about any crash significant enough to potentially compromise battery integrity," the automaker said.

车上配置有他们的ONSTAR安全沟通系统，汽车制造商表示“通用公司能掌握车辆的每一次严重撞击并有可能导致电池不安全损害的时间。”

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Railtrack has overall responsibility for safety, but, as this week's crash showed, the train operators need to improve safety systems too.

ECONOMIST: For the sake of a red light