Until there's a broken-down vehicle blocking the road, and the only way around it involves encroaching on the cycle lane (carefully!) ... but your hi-tech geofenced car forbids that, so you're stuck.

Or you attempt to move out of the way of an oncoming emergency vehicle, as it's barrelling down the centre of the road to reach a dying patient ... but it needs an extra couple of feet of space that you can only give it if you move partly into the cycle lane. And your car refuses.