It is in beta, and the developer is seeking beta testers. But it promises OMP with voice chat and current weather conditions of the actual locations. I have not tried it but I am curious. I prefer multi-car racing to single-car racing for best lap times (except for rally racing). So, this might be a better game for me than Assoluto Racing.

The Promising Racing Game 'Street Kart' Is Now Officially in Beta
http://toucharcade.com/2016/08/29/the-promising-racing-game-streek-kart-is-now-officially-in-beta/