Highway Post Office Covers
- 1st and 2nd Trips made on
November 13, 1950 from Boston,
Massachusetts to Newport, Rhode Island.
Highway Post Offices (HPO)
were added as an additional service to the Railway Post Offices in
1940. This service was provided through
June of 1974. There were
410 postal routes
covered by the HPO. By 1950
there were only 22 HPO routes
left in operation.
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