Look at the location of the mailboxes on your street. On some the Post Office allows them to be on both sides of the road, on others they are supposed to be on the same side. We are not certain why this is so. In any event place your mailbox on the same side as the others on your street, close enough to the road where it can be easily accessed by the mail-person, yet not so close to the road that it presents a hazard to passing traffic.