The triangles are known variously as 3-D, virtual or just plain fake speedhumps.
这种三角形的东西是所说的各种不同的3维，实际只是纯粹假的最高时速测量器而已。
2
"If there's a road with several speedhumps then I'll be off by the time we've crossed the last one," she confessed. "I don't drive very often."
“如果路上有好几个减速带，那我就在通过最后一个之前下车，”她坦然地说道，“我不经常开车。”
3
Like many other municipalities, Philadelphia has tried a variety of devices to slow drivers: real speedhumps, traffic circles, curb extensions, rumble strips, slightly raised crosswalks.