Answer:
If you drive on this, pedestrians and the police will be pretty upset with you.
People want it, and when they have it, they use it by giving it
Break it and it gets better, immediately set and harder to break again.
It keeps you on the ground and stops things from floating around. What is it?
Tear one off and scratch my head, what once was red is black instead!
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.