[BoxFour]

A single double-parked car in my city can result in the street being completely inaccessible for thru-traffic. I've also seen them break out the spotters and back up into their turning lane.

I assume they're also reticent to implement the nuclear option, because even a cursory google search didn't return any incidents of this happening anytime recently (though obviously that doesn't mean it doesn't).

It did, however, return a few results about fire trucks being in (non head-on) collisions on city streets and several firefighters being injured on-board.

[midoridensha]

When a fire truck pushes another vehicle out of the way, it doesn't ram into it at full speed; that would be dumb. It slowly makes contact with the vehicle, then pushes. A fire truck easily has enough power to push a parked car out of the way. Of course, this doesn't happen often.