Arrival time estimate, any tweaks?

[BarryR]

From a post I read here, I'm not too optimistic that there's a solution, but is there a tweak to adjust the arrival time estimate calculation? It's OK for local roads but majorly overestimates for expressways.

BTW: I have a TomTom One.

 

[digital-flex]

I don't believe there is one as AFAIK.