In my experience, after riding motorbikes in Thailand for 25 years, NO ONE gives way to motorbikes.
Vans, trucks, car, lorries all expect the bike to give way.
Even when the bike has right of way.
I even get aggressive horn beeping when I do not stop and let vehicles out of a side road when I am on the main road.
They try to edge out, I do not stop and they get angry! Wow!