Would it be possible to add stop signs and street name signs (other road signs as well such as speed limit yield etc.) maybe street lights in the future?

There are already other mods that add these blocks.
https://www.curseforge.com/minecraft/mc-mods/road-stuff

aye but that one hasn't had signs since 1.7.10 and isn't even updated for 1.20.1 :), also your mod is the only road mod included currently in the FTB unstable 1.20 modpack that we are running on the server. But I understand