Amish and Cummins

You say: "Tell me, how do they mix?"
Well. I saw it today. Here's how!

 I was traveling along the road and came upon a buggy. Since it was on a hill, I was not able to pass. I followed and saw this. Upon closer inspection I confirmed that there on the slow moving vehicle sign I was indeed seeing this:

 

 Typically it goes here:

Yes, they do drive buggies, but it just goes to show what some of them would really rather be driving! :)