Brake Marker Location Question Options

[Charles Freeborn]

Here's more of a racing / data question.. but since I race a 914 it sort of relates.. or that's my story and I'm sticking to it.

Maybe a total eyeroll question for you veterans. But here goes..

How are the brake distance signs placed or located? I mean the 500, 400, 300 foot signs.

I've never given it much thought - other than to trial and error; see how far I can push and then use that as my reference.

Are they a specific distance from a specific part of each turn, such as a tangent from the maximum radius inside, outside, or middle of the track? Is this metric consistent from track to track, or even turn to turn on any given track?

The reason I ask is I'm learning about data collection and the Aim software used to analyze it. I'm on this journey with a friend who is very minutia oriented (he's an accountant), and would like to be able to see where on the track, relative to the fixed markers, his data lines are occurring.

I personally am not anywhere near as mathematical, drive much more by feel and determine my own visual markers based on the fixed ones, but I have to admit this question has piqued my curiosity. I'll pose the same question on one of the Aim forums, but thought I'd run it up the pole here first.

Thanks!