User blog comment:Mr Procrastinator/Length of Drag Races/@comment-26249703-20160217160349/@comment-26249703-20160217173858

I see, nice idea. I was testing some methods the other day for the full length of the tracks, I think the best way is Hunter/Head to Head events, in two parts:

First, overtaking then holding the opponent, giving a baseline for the distance (as it won't be 0 yeards/metres). I only tried it on one, so I don't know if it would change between cars (maybe trying something like the i20 WRC and a Bentley to test that). There was a difference between holding and reversing into: 5 yards Vs. switching between 5 and 4.

Second, back up from the line and wait for the opponent to try and overtake before blocking.

Then it's just a case of subtracting the result in the first part from the second.

Can you think of a more accurate way?