If there's a broken down vehicle blocking the car portion of the road, the road is closed. If the bike lane were protected with a physical barrier, you wouldn't

If there's a broken down vehicle blocking the car portion of the road, the road is closed. If the bike lane were protected with a physical barrier, you wouldn't be able to enter it. Why shouldn't it just be off limits? I'm unhappy about a lot of the things self-driving cars will bring to our cities, but the one good thing that might happen is automatic bike lane enforcement.