In a post on their Patreon Chris and Tony West revealed earlier this month that the Bonneville flats will feature in their game. Located un Utah, this dry Pleistocene salt lake has been used for speed records since 1914 due to it’s near perfect flat surface, and the Patreon post previews a few completed objects.
Obviously I’m not circumventing the Patreon membership here and can’t post more than I have (the post title is visible publicly). If you don’t want to sign up to Patreon yourself, check out the Ages of Speed Web site for some initial insight on the game. Frankly, I love just how niche and full of oddities it is.