Proper traction settings for historic tracks?

Is asphalt modeled the same way in modern and in historic versions of race tracks in AC? I feel the traction of the surface feel quite similar. I'm wondering if there is any big difference IRL between surface traction in the past vs now. Do you guys adjust traction settings accordingly when using historic tracks?

 

I think the main difference between historic tracks and modern ones was they were much bumpier. Not sure how much different a new surface 50 years ago compared to new surfaces today or if anyone even has data to give a basic idea of this.

If your talking about old run down historic circuits rarely used with tarmac breaking up today these would clearly be less grip I assume, but how much less would be the tricky question.

Probably track builders today will have an idea of the differences in grip from old tarmac mixes vs what they use currently on tracks. Very often you hear things like the tracks been resurfaced and it should be a bit quicker. Bathurst was a good example and was supposedly about 1-2 seconds faster after the resurface. Is that mostly due to less bumps or is the new tarmac compound also providing better traction? will this be the case in a few years or only for a short time.

As a basic example I remember when they moved the f1 gp to Albert Park, the new surface was put down for the first gp and driving on it at road car speeds it was so amazingly smooth. Im fairly sure it hasnt been resurfaced since, now even at 50kmh its very bumpy so its likely a fair bit slower then when it was first laid down.