[kakwa_]

One solution is to have lines for bikes and scooters.

In fact, for example in Paris (where I live), there is a lot of dedicated lines for bikes, and there are also dedicated bus lanes that bikes can take. When I commute by bike, I think only 1/3 of the road is actually in the main traffic.

Also as a pedestrian, bikes and scooters are a bit of a nightmare. Personally I instinctively rely on hearing when crossing a street, and because bike and electric scooter move silently it's not difficult to miss them, specially as there are also smaller than cars, so also more difficult to see.