If you ride my bus and stay in the wheelchair, I will put a lap belt on you. I don't offer it, I just do it. I have found that if I ask, then the guest will usually say no and that actually makes more work for me as I then need to call the Ops Center and report that the guest refused the lap belt. What I will do when putting the belt on is say something like, this is to prevent you from coming up and telling me how to drive or something like that. I don't normally pull the shoulder belt for many reasons but mainly, the fact that, unless the chair is perfectly positioned, it doesn't work right. The same goes for power chairs. The shoulder belt has always been optional, if you want it, ask for it.
The only time that I won't put a lap belt on is if the guest already has a seat belt on that is attached to the chair.
Unless you cannot transfer, you don't ride on an
ECV on my bus. It's not because I'm a mean old bus driver, it's for your safety. 3 wheel ECV's are notoriously unstable and don't have proper anchor points on them. I am more lenient with 4 wheel ECV's because they are less of a tip hazard. But again, if you stay in it, you get a lap belt.
What I do is company policy, if you get a driver that does not do this, he is not following procedure and can be endangering you and other guests. If a driver does not fasten down an ECV, you should speak to a manager, that is just not safe and the driver needs retraining.