The cat's eye design originated in the UK in 1934 and is today used all over the world. The original form consisted of two pairs of reflective glass spheres set into a white rubber dome, mounted in a cast-iron housing. This is the kind that marks the centre of the road, with one pair of cat's eyes showing in each direction. A single-ended form has become widely used in other colours at road margins and as lane dividers. Cat's eyes are particularly valuable in fog and are largely resistant to damage from snow ploughs.
Cat's eyes have been shown worldwide to drastically help reduce traffic accidents - particularly those caused by improper lane changes.
I believe that the Government of Ontario should retrofit the entire 400-series highway system with Cat's eyes.