The map is just the section road shown in Initial D. There are invisible walls at the ends and weird map geometry because the map is not supposed to go any further.
Ahhh, thank you. Good to know it's not a problem with something at my end. I was just confused when the road stopped as every map I've driven on until now has been a complete map/route etc and not a single road. I was not aware such things were done, and thought maps would all be at least a loop. Thanks again for letting me know. It it a lovely map, I wanted more & didn't want it to suddenly end