Let’s assume we’re not stopped at a traffic signal.
This is only anecdotal, but I heard once that you’re not supposed to stop altogether, rather drive at a slower pace so as to let it pass quickly. The person said what was more important is that drivers don’t make sudden changes to their behavior. An EMT driver can more safely maneuver if they don’t have to predict what any one knucklehead will do the moment they get close.
If this is wrong or needs clarification, please enlighten me!
The bare minimum is stop dead. The preferred is pull to the right, same as you would for a cop. And yes, be predictable. Nothing sudden or unexpected.