All roads and highways which are, on May 4, 1921, by law open to public traffic shall be public highways within the meaning of this part 2.
Source: L. 21: p. 362, � 2. C.L. � 1386. CSA: C. 143, � 93. L. 45: Ex. Sess., p. 41, � 1. CRS 53: � 120-3-2. C.R.S. 1963: � 120-3-2.