Should motorbikes and cars share lanes? How to deal with left turns (the dangerous ones) in junctions? Should motorbikes and bikes have to do two-step left turn?

two-step left turn illustration

There’s an idea that we should categorize vehicles as human-poweres or not. Is this a good idea? How about paddle-assist-only ebikes?

When there’s not enough space for lanes, which type of vehicle get compromised?