How Much Should You Be Spending on running surfaces?

http://www.imfaceplate.com/h6lztcq814/5-laws-anyone-working-in-running-athletics-facility-should-know

Asphalt - Now you would think that asphalt is simply as bad as concrete, but it is not. It's actually about 8 times "softer". The real problem with working on asphalt roadways is not the hardness, however the camber