Where is the distance of a race track measured inside stripe or outside stripe?

Question

Where is the distance of a race track measured inside stripe or outside stripe?

Answer 1

Don't know about other sports but in Speedway the length of the track is measured on a line 1 metre out from the inside kerb.

Answer 2

That really depends upon what is racing on the track. In NASCAR (not my favorite), the track is measured from a point 15 feet in from the wall, going around in a circle.

(ref :http://nascar.about.com/od/nextelcuptrac...

whereas on some road courses (with multiple left and right turns and chicanes) the "race line" is measured with a fifth wheel (this is usually considered the centre of the track as an average).  The FIA states:

The length of a circuit for the calculation of race distances, race records and classifications is considered to be that of the centreline of the track.Unless otherwise stated, all references to straights and curves in these criteria concern the actual trajectory followed by the cars with the highest performance and not the geometrical form of the layout (The trajectory, when traced on the plan, will generally have the effect of reducing the straights and elongating the curves: when planning or modifying a course, the designer must base his calculations upon it).

www.fia.com/resources/documents/108211...