They recently resurfaced the asphalt highway on my commute...they scraped the 1/2 inch top layer off and then put down tar-like substance, covered the tar in rock chips and then vibration rolled it. Grips awesome in the winter but is really bad on tires and fuel economy until it wears down a bit...
...its too bad 1/2 my commute has this covering...or else I would be getting better numbers.
