i have extended the expressriverway mod by b25 mitch so all credits in map design goes to b 25 mitch i removed trees since they impact alot of fps and they could not be moved properly removed most building in the copy (the first road has them still) ill keep working on this week
If you really want to "extend" this, you should go to find Brisbane on google map and model other buildings beside the riverside expressway instead of just copy, and paste the original section
iam happy i could use the level editor and i like going on highways but ssbr has just a straigt line and this has some curves so
Between times on your map editing, try out two maps I made, Nevada Interstate and So-Cal Interstate. They should both be in the map mods section here. If you want expressway, So-Cal has over 40 unique miles of expressway, and about 60 additional miles of side-roads. Not trying to de-rail your thread here but you mentioned you couldn't find any expressway - the exact reason I made my map(s). Edit: You may also feel free to use my road textures, though they're american ones.
update 2.1 removed most floating things and removed some buildings to improve fps post screenshots if you find floating things known bug is falling trough ground if you go off highway