A Productive Rant About running surfaces
https://oscar-wiki.win/index.php?title=The_Most_Common_Complaints_About_running_surfaces,_and_Why_They're_Bunk
Asphalt - Now you would think that asphalt is just as bad as concrete, however it is not. It's actually about 8 times "softer". The real problem with working on asphalt roadways is not the firmness, but the camber