Los Angeles is painting some of its streets white (2018)
cbsnews.com
cbsnews.com
It is worse to use the roads as a pedestrian or cyclist since you will be hit by that radiating energy.
It also needs to be done with products that don't become fine dust ground up by car tires, which exist.
There's a lot of road if you can solve the radiating energy issue, unless you want a car based society.
Reflecting light above people is still good like roofs or trees. Trees are also good in winter, they reduce wind, not sure how the white roads would go.