Apparently so!
Long before TSA we were able to just ride these lounges between gates.
From their website; "The Mobile Lounge was designed by the Chrysler Corporation in association with the Budd Company. It is a 54-foot long, 16-foot wide, 17 1/2-foot high vehicle, weighing 76,500 pounds. A Mobile Lounge can carry 102 passengers- 71 of them seated- directly from the Terminal to the aircraft on the ramp. When the Airport opened in 1962, passengers had to walk only 200 feet once they entered the Terminal until they were seated in the Mobile Lounge for the short trip directly to their aircraft, a unique service offered only at Dulles."
