I was a clerk for 9.5 years. While doing that I was Saturday Air driver for 5. Both made driving friend/T a little easier. You learn a lot about the routes believe it or not. I've covered routes and had the same bad addresses that I corrected in the past.He uses various tools at his disposal to find the correct address on those packages . Historical delivery records , the internet, and in my opinion is the backbone of the whole delivery operation.