Establishment of post roads
39 U.S.C. § 5003
in effectThe following are post roads:
(1) the waters of the United States, during the time the mail is carried thereon;
(2) railroads or parts of railroads and air routes in operation;
(3) canals, during the time the mail is carried thereon;
(4) public roads, highways, and toll roads during the time the mail is carried thereon; and
(5) letter-carrier routes established for the collection and delivery of mail.
Source: OLRC USLMURL: https://uscode.house.gov/download/releasepoints/us/pl/119/95/xml_usc39@119-95.zipFetched: 6/5/2026
