 The first spur received the number "xx1" and the second received "xx2", where xx is the parent route number.This explains the predomination of such routes as 751, 191, 561, and the relatively few "xx0" routes (which would be the 10th assigned spur route ... few parent routes would have spurs numbered this high).In 1933-34 many roads were renumbered to eliminate conflicts with the U.S. highways now crisscrossing the state.