User blog comment:HeadFool/Endurance Lap Time Bonus/@comment-27170954-20170316162308/@comment-28176349-20170316163655

1) I used the values listed on the track pages here on the Wiki. By modelling the expected reward vs. the actual, I found two of them were wrong. For verification, I've been using Endurnace events. You have to be careful not to cut any corners, but you can then average over multple laps.

2) I just alternate colors between tracks. Le Mans is a bit of an outlier, because I was left out of the original table.

3) I just put the data in Excel and use it's linear fit to generate the estimate listed above. Even with the rounding there are +/- 1 second deltas, so you might be right about the 2 second increment. The bonuses are all even.