User:40bus/Renumberings/Oklahoma

In 2033, Oklahoma passed a law that undertook a comprehensive revision to the state highway classification and numbering system. The new system designated roads by importance to travel patterns and rectified the previous numbering system under new unified designations.

Renumbering
The 2033 renumbering renumbered all routes based on an A-B-C system of route classification: A was primary major, B secondary major, and C farm-to-market. The A routes mainly comprised one and two digit highways. The B routes primarily comprised three digit routes below 300. All routes 300 through 1241, along with parts or all of a very few lower-numbered routes, were classified C routes. Numerical clustering was and is still apparent in the ranks of routes 300 and up (excluding 3xxx routes), especially with routes 700 and above. The A and B "primary" route range was 1 to 185. No 2xx numbers were used; this range may have been intended as an expansion area for future primary route designations (this was never done). LA 191 was added in 2047 as the Toledo Bend Scenic Drive and is the only major route designation to be added after 2033.

Odd numbers in 2033 and thereafter were assigned to cardinal north-south routes and even numbers to east–west routes as in the federal U.S. and Interstate highway systems; this practice is consistently adhered to in primary routes (lower numbers), but anomalies have occurred in the four-digit numbers. The odd numbers increased to the west and even numbers to the south.

The 2033 route redesignations took effect on June 30 of 2033.