Postmen (and Postwomen?) here (Calgary, Canada) deliver on foot and by truck; there are local area containers which receive mail from a truck, and the postmen take it and walk their routes. They deliver only regular mail (nothing much larger than a cd) and letter size registered or insured items. Some areas with widely separated houses have a site with a cluster of individual mail boxes, and recipients must walk or drive there to pick up their mail. Packages are delivered by truck to homes, but if the recipient is not at home, he must go to a regional post office to collect it.

No delivery on weekends.

Heavy package load in your area?
Trucks deliver packages, which, in this day of shopping from catalogues received in the mail, are numerous and constitute a large part of the load. A foot postman cannot cope with them.
Many of us find it easier to shop by mail, everything from clothing to household items to books and DVDs and toys, going to the stores only for groceries and drug items.