as... as

 "A government study concludes that for trips of 500 miles or less... automotive travel is as fast or faster than air travel, door to door" (George Will, syndicated columnist). The problem here is what is termed an incomplete alternative comparison. If we remove the "or faster than" phrase from the sentence, the problem becomes immediately evident: "A government study concludes that for trips of 500 miles or less... automotive travel is as fast than air travel, door to door." The writer has left the "as fast" phrase uncompleted. The sentence should say "as fast as or faster than air travel."