What's the proper action for an emergency vehicle with lights but no siren?
I didn't want to jack the other thread, but I was thinking about an experience I had a few weeks ago.
I was driving on the freeway (40E/85N between Greensboro and Raleigh, NC) and I saw red flashing lights a good ways ahead. I was already in lane two on a four lane section and traffic was light, but I moved over to lane one and continued at around 73 mph (in a 65 mph section).
It seemed to be taking forever to reach where I had first seen the lights, then I realized it was an ambulance driving in lane 4 at about 55. There was a gaggle of cars driving in lanes two, three and four behind the ambulance. I slowed to about 68 but passed all of the traffic including the ambulance and returned to my previous 73. A few moments later I saw the ambulance take the exit I had just passed and traffic started to thin back out and some cars even caught up to or passed me.