Former collegiate mid-D guy who has taken up the roads this fall. College PRs 1:52 800 and 4:11 mile. On the roads I've run a 10k in 31:30, a 15K in 49:07 and a half in a little over 70 minutes, all in the last 3 months. Trying to cap off my season with a sub 15 5K. With my middle distance speed how hard will sub 15 on the track be? Easier on the roads?