[Mitch58]

Unless you plan from the beginning for just that result all the lanes rarely come out EXACTLY the same.

In our club racing format each racer rotates through all of the lanes so if there is a bit of a difference it doesn't matter.

My track I've only measured the middle lane to figure the track length, it was a smidgen under 70'

Another club track was planned by the owner with an equal # of left and right curves and the same radius's for each direction. all three lanes are exactly the same. 66.5'

One of our 1/24 scale 4 lane tracks was recently measured and the result was about a 1-2" stagger over 70'