Idk how to explain this but if I were you and am going to make a bus stop pull in, I would use invis_street to align each CAR path to another, then use O3D's Simple Crossing Splines i.e. Asphalt10m etc to make the bus stop pull in, putting a bus stop cube. Your best bet would be looking at existing great maps such as Ahlheim Laurenzbach, Botw, cotterell etc to learn a bit about map building yourself. That was how I learnt a few concepts and tricks!