This can be said in one of two ways. 
1) as an acknowledgement/greeting of the man driving the bus
2) as an entire, exasperated expression, as in “Hey! Mr. Bus! Maaaaaann!!”

Which way do you think I mean most often?

Mr. Bus, you brought this condemnation on yourself by driving like a maniac today, and nearly running people off the road.  I hate to break it to you, but you are not a Fortwo with the ability to weave in and out of traffic like Speedy Gonzalez.  You are a bus, and the right-hand-lane has your name written all over it.  In light of this “revelation”, I believe a refresher course in Left-Lane-Etiquette is in order. 

It is mind-boggling to me that people all over America do not understand the left-lane concept. 

Also, for the purposes of this post, feel free to replace Bus with Truck.  Or with any car that drives at or below the speed limit in the left-hand lane.

Mr. Bus, there are two scenarios that illustrate the point that you should NOT be driving in the left-hand lane.

Reason/Scenario #1
This calls for a diagram.  My Paint masterpiece, to be exact.

left hand lane ettiquette

You are colored blue, Mr. Bus, because to me it is the color of obliviousness.  The cars behind you are colored red because they are so heated it is impossible for anyone NOT to notice that they are as such. 

Now, as you can see, we have a problem.  The right lane is for those going the speed limit (or under).  The left lane is for people who need to pass you.  But, please note, we cannot pass you when you are traveling the same speed as the traffic in the right-hand-lane!!!  This is not rocket science!  The name of the game is Speed or Bleed.  If you can’t keep up, get over or suffer the consequences.  As Margie has said, it’s obvious you don’t feel the need to get ahead of anyone, so why not kindly drive BEHIND someone else going as slow as you?!?


Reason/Scenario #2
I have this reason because I made that snide little comment about Speed or Bleed.  For you, however, there is no option.  You are so humongous that speeding is quite simply out of the question.
You. Are. A. Bus.  Your license plate even testifies to this.  In all capital letters.  B-U-S.  You are not a Corvette.  Nor are you the Knight Bus.  Please.  The left-hand-lane is reserved for people who need to pass slowpokes.  You, however, are a slowpoke by nature.  You are ginormous, and a careening 10 ton vehicle does not make ANYBODY feel safe.  Even if you feel inclined to keep up with traffic, we beg you not to.  The left-hand lane is not for you.  Just, please, accept this fact and save us the terror of driving behind you.