"tire rubber" refers to the material that is used to make the outer portion of a tire. It is a strong and durable substance made from rubber that allows the tire to grip the road and provide traction. Full definition
Also, cars tend to smear dirt, dust, oil, and tire rubber on the stuff they drive on; after a few weeks of use, a «solar road» would probably be recieving very little sunlight. (realclimate.org)
I will give it a try, I'm a little shy as I had Kale prepared in an egg recipe and I felt like I was eating tire rubber. (elanaspantry.com)
One solution that's been posed is asphalt rubber — a blend of asphalt cement, reclaimed tire rubber and other additives. (silive.com)