[truckster]

When I run, it's early (4:45) and there's almost no traffic. I do run against the traffic and I wear reflective gear. Running on a track bores me, especially over a 5 or 6 mile distance. Plus the track is flat, and I like to run hills - big ones.

Flexible pavement structures are one of the things I specialized in as a combat engineer in the Army, and asphalt is considerably softer than concrete.