The Bulldozer – a type of rabbit that clears the way.  Usually a larger vehicle with bright headlights.

A Snow Plow is the basic example – makes way for you to be able to pass.  But in this case Emergency response vehicles,  Ambulances, Fire trucks, Police cars, give a better idea of what happens..  Flashing lights and sirens move cars out of the way.  Unfortunately, traffic usually collapses back in immediately and laws usually prevent you from following too closely, limiting their usefulness.

What you are usually looking for is a serial tailgater without fear.  A car willing to ride the bumper of the car in front until it moves over.  A driver willing to brave Mutually Assured Destruction in the case of a “brake check” maneuver.

If you see a bulldozer coming up from behind – move over.  Let it do it’s job and follow in it’s wake.  Keep in mind, the more effective it is, the more space you want to give it.  Just in case something crazy does happen.

Unfortunately, these are fairly rare on any roads with more than 2 lanes going in the same direction.  That level of crazy is usually too impatient to wait for the slow cars to move out of the way and will usually weave amongst traffic to get ahead, leaving you with a collection of spooked cars to deal with before things settle down again.

Origins: Black Maxima, The Loop 2005, Vancouver to Hope leg.