Financial priorities first?
Wonderful idea when we are all basking in lots of funds sloshing about but here in the UK the roads are full of potholes and a nice piece of ordinary tarmac would be great. Also potholes would appear as dark patches and the driver would not be aware if it's missing or fouled paint or a great big hole!! Cute idea but a bit impractical to say the least, good lights and a competent driver would be better.