How many cats eyes on the road are there in the world - would there be more cats eyes than human eyes?

Cats' eyes on the road, commonly known as cat's eyes or road studs, are used as reflective road markers for safety. While it's impossible to determine the exact number of cat's eyes in the world, estimates suggest there are millions installed globally. Given that there are approximately 8 billion humans with two eyes each, it’s likely that there are far more cat's eyes than human eyes. Thus, yes, there would generally be more cat's eyes than human eyes.