Actually, I think a full lane dedicated to bike traffic would make a far BETTER ambulance route.

Have you ever seen an ambulance or cop car try to get through rush hour traffic? Problem is, everyone is already jammed onto the highway. The emergency vehicle comes up with it's sirens going and lights flashing, but no matter how much they want to get out of the way, the cars on the road have nowhere to go if there's no shoulder.

Imagine the lane is filled with bikers. Bikers could actually stop, get off their bike and set it on the sidewalk letting the ambulance through.