A bridge too low

时间:2019-03-07 12:03:02166网络整理admin

By Barry Fox Truck drivers sometimes miss warning notices and smash into low railway bridges, where they get stuck. Now Bill Corbett of Sheffield reckons he has an answer (GB 2 334 802). Since conditioned reflexes make even tired drivers stop at red traffic lights, he reasons that hanging a flexible rubber bar over the road at bridge height, about 100 metres ahead of it, should work. When an oversized vehicle strikes the bar, it turns on a red traffic light just in front of the bridge, causing the driver to brake. The light will stay red a while,