a police barrier 警察屏障
But the lanes are protected from motor vehicles by a line of white paint-a largely metaphorical barrier that many drivers ignore and police do not vigorously enforce.
通道上的一条白色油漆线保护了自行车不被机动车撞到，但这条线在很大程度上只起着象征意义，因为许多司机根本不在乎这条线并且警察也不严格执行保护自行车的措施。
The officer had spotted the car sitting stationary on the rural crossing with the road barrier up moments before the high-speed crash, police said on Sunday.
警方周日透露，这名警察在这起高速撞击事件之前不久曾看见这辆小汽车在道路护栏抬起时停在那个郊区路口。
The barrier then came down and the police officer went to the emergency phone.
英国交通警察副警长安迪·特罗特说：“然后道路护栏降下来，这名警察跑去打急救电话。”
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