Concrete/road run intervals (3 sets of paces) 56:00 [4] 5.0 mi (11:12 / mi)
I was able to basically execute my plan. Each pace increase was almost 1 min from easy to maraathon and then 30 seconds faster the last pace and each sr was 5 seconds then the last. I think this may be a bit slower than what you have but I got there.