They have various names; in the U.K., you'll hear them called "cat's eyes," while in the U.S., they're usually referred to as "road reflectors" or "raised pavement markers." While apps like Waze ...

The cat's eye camera beat the conventional camera five out of seven times, and the two times it lost were within a 10% accuracy margin. The in-built reflector in a cat’s eye reflects the light ...