https://transpressnz.blogspot.com/2022/05/us-mail-highway-post-office-1.html
transpress nz: US Mail Highway Post Office #1
From the look of it, a White bus converted.
us mailhighway postnzoffice
https://durhampost.ca/three-vehicle-crash-closes-portion-of-highway-401/embed
Three vehicle crash closes portion of Highway 401 - Durham Post
vehicle crashdurham postthreeclosesportion
https://mailboxlocate.com/offices/1364447-gardner/
Gardner Post Office - 25336 State Highway 69 Unit A Gardner, CO
Gardner Post Office in 25336 State Highway 69 Unit A Gardner, CO, offers USPS services like package delivery, first-class mail, PO boxes, and more.
post officegardnerstatehighwayunit