I understand, Lisa. I was a temporary sub city carrier myself in '57-'58 in a small town, then a full time clerk in Dallas in '59-'64. I never had a problem with my rural carrier; it was in the city where the problem occurred. Way back in the days when I worked for the Post Office, the city carriers walked, and went up to a mailbox by the door at each house. I'm not sure just when the change was, but by '77, in new developments, they required rural type mailboxes at the curb; one house would have theirs on the front left corner of the lot and one next door on the front right corner so the boxes were in sets of two. That was where the problem occurred because the Post Office did not take into consideration state and local traffic laws. In my case, it was perfectly legal for anyone to park, blocking the mailbox, at any time as long as the vehicle did not remain unmoved for more than 24 hours and the hard heads at the Post Office at that time offered no solution at all; just said they wouldn't deliver the mail if the box was blocked by a parked vehicle. So the letter I wrote to the congressman simply asked if there was any solution other than my renting a P. O. Box at the Post Office.
Of course, there have been more changes in recent years. In the new city developments now, they only put up one box, with mutiple locked compartments, per city block. So, depending on where your house is located in that block, it may be right in front of your house, or it may be down at the other end of the block. And of course, the carrier has to get out of his/her vehicle to put the mail in the boxes, but only once each block.