I was watching a news show last night. I don't recall which one. It doesn't really matter.  They had 2 pilots in a simulator talking about this crash. The one pilot made a recommendation at the end.  His recommendation: when emergency vehicles are on the runway, have all planes go around.  Make this standard protocol.  Don't allow planes to land or takeoff while emergency vehicles are on the runway area. I think a second part to this would be hold all emergency vehicles until all planes actually landing are cleared off the runways.  

I am no pilot, not an expert.  However, this idea sounds like it is worth exploring. See how it would work "on the ground". At the very least, it is worth a discussion.