Aschool in Canada is using a bizarre 3D optical illusion of a young girl chasing after a ball on the road to make drives slow down.
加拿大一所学校用奇特的3D光学技术制成一个女孩在马路上追赶一只球的幻影，以此提醒驾车者放慢速度。
资料图 学校路面画3D女孩 吓唬司机减速慢行
At a distance it just looks like a marking on the road but when the car is 30 metres away it appears to suddenly rise up from the road. If a car is travelling at the speed limit for the road, 30km/h, then he should be able to stop in time before he reaches the image.
远远看去，这个幻影就像是路面上的一个标记，但是当汽车离她只有30米远的时候，她就会突然“站立在”马路上。如果汽车的速度在每小时30千米之内，当驾车者看到幻影的时候，就来得及刹车。