It looks like from these pages (search for "Miami, Oklahoma" there is also a BP checkpoint on I-44 outside Miami, Oklahoma I have driven I-44 to Miami but never NE of the town so I don't know. Anybody seen it recently? The case in link three below notes it was there in 1975. A forum post and news article show it was still there over the last couple of years. a bit tangent to the original post but now I am curious.
http://www.aliciapatterson.org/APF18.../Davidson.html
http://www.thehighroad.org/showthrea...=384601&page=4
http://bulk.resource.org/courts.gov/...6.74-1815.html
Ciao,
FH