Interesting. Cows won't step over painted parallel lines if they have encountered a cattle guard before.
Where a cattle guard is parallel pipes in the road at a gate opening meant to keep them in...their hooves can't negotiate the spaces between the pipes.
The painted one is sorta funny, such a low tech solution. I recently came across this interesting tidbit: "Cattle grids are generally useless for containing goats. However, a Texas Highway Department official reported that adding three 20-inch (51 cm) painted stripes—arranged yellow, white, yellow—on the road in front of a cattle grid deterred goats from approaching or crossing the guard."
https://en.wikipedia.org/wiki/Cattle_grid