Sentence:  Let me pass over the trip to Sante Fe with something of the same speed which made Mrs. Roebuck `` wonduh if the wahtahm <WSD>speed</WSD> limit '' ( 35 m. p. h . ) `` is still in ee-faket '' . 
Meaning of the word marked with <WSD> tags:  regulation establishing the top speed permitted on a given road