I guess it's not too bad then, 5hrs is still at the edge of acceptable.
I can foresee a couple of PTT stops for Amazon iced coffee along the way when I head there in the near future
It is completely flat as seen on on board videos,
as for circuit elevation, it does get easier if the land had natural contours but I don't think man-making a couple of track sections with some banking or elevation would have hurt the Buriram owners much, nevertheless, it still look like a glorious circuit to drive on, reminds me a little of Yas Marina, which is almost completely flat as well, but nothing as wide as Buriram
when one need the urgency... 5hours drive is nothing...
even my team regularly travel 5-8hours driving distance going to track around malaysia for bike's race event... huhuhuu