I just saw a video of a Google self-driving bike on Linked-In. It is a 2017 April Fool prank, but that just means it is fake in this instance, it doesn’t mean it couldn’t be done in real life. It is fun to watch anyway.
In 2005 I invented a solution for pulling bikes along on linear induction motor bile lanes, pulling a metal plate attached (via a hinged rod to prevent accidents) to the front forks.
The original idea was simply that the bike would be pulled along, but it would still need a rider to balance it. However, with a fairly small modification, it could self balance. All it needs is to use plates on both sides, so that the magnetic force can be varied to pull one side more than the other. If the force is instantly variable, that could be used in a simple control system both to keep the bike vertical when going straight and to steer it round bends as required, as illustrated on the right of the diagram. Therefore the bike could be self-driving.
Self-driving bikes would be good for lazy riders who don’t even want the effort of steering, but their auto-routing capability would also help any rider who simply wants navigation service, and presumably some riders with disabilities that make balancing difficult, and of course the propulsion is potentially welcome for any cyclist who doesn’t want to arrive sweaty or who is tiring of a long hill. Best of all, the bikes could find their own way to a bike park when not needed, balancing the numbers of available bikes according to local demand at any time.