If I ever knew what those are I would comment, but I've never been a bus guy 🙂
On the subject of buses though have you ever seen the Tomica motorised buses? I don't mean the plarail types, these are about 'N' gauge I would guess and incredibly detailed. They have little motorised chassis that you can fit various bodies to and have special road pieces that fit together a bit like a slot car track, but without a slot. The buses will then diligently follow the roads, observing things like stop signs, can be programmed to pull over at bus stops etc... by placing little magnets on the underside of the piece with the bus stop on it. They will then pull in, can wait a pre-determined time then start off again. Wicked system if a bit pricey 🙂
