Sprint racing is usually on tracks from just under 1/2 mile to just over 1 mile.
Road racing is usually 1.5 mile to 4 miles (RA days). Karts have been running long courses for a very long time. The original VIR kart races were 3.27 miles until it closed in 1974. Upon its revival karts have run the 2.25 mile North course, the 3.27 mile original Full course, and Bernie even ran an event on the 4.2 mile Grand course. We used to run the 3.5 mile long course at Watkins Glen. That’s what Kart Road Racing is all about…being able to run the same big courses as the cars and bikes (at a fraction of the cost!).
To be able to run a modern, state of the art F1 track will be a dream come true.