I gave you the official, legal response from the United States Post Office. If you would like to discount it or continue discussing whether the police can arrest a postal driver for parking on the wrong side of the road, I invite you to begin a new thread. It has nothing to do with this one.
No you gave me the legal response as to why the USPS would not pay the $700 or so in fees, it did not mean the tickets were not valid and they would not reprimand the drivers for getting them.
Wow according to you I can get a job as a USPS driver and do donuts in the middle of an intersection and break laws because they have immunity from laws!
You are confusing paying fines and getting the ticket. They are immune from the first but not the second.
So the cop in Detriot was WRONG to differentiate the Amazon driver and the USPS.