Also, a stake in the ground on the edge of the road that says, I'm 15 feet to the right of the center lane will probably pay for itself in a couple years of stripping. You put two in the ground that say, I'm 15 feet to the right of the centerline and 35 feet from the next beacon and you never have to paint a centerline there again.
*with a much longer life. Stripping needs to be done every year to stay fresh. You can put a beacon in the ground and I should be able to be there and working 10 years later.