Always experimenting with road materials because nothing seems to work or survive satisfactorily in this climate, DOT is using rubber surfacing compounds on local roads. The best thing to preserve the road I have seen so far is to paint the blacktop white, but traction is reduced.
The best ideas I've seen are:
A:) for asphalt roads using a fabric underlayment to increase the integrity of the surface
B:) for cement roads using a giant grooving machine to take out waviness and increase traction as a road ages..
Asphalt is recyclable , the scrape/mix in new/re-apply paving technique is really nice.