- Routing Road Type - Choices of -1, Neutral, +1 (Level 4 required). Raises or lowers the road type used in the routing server calculations. Only applicable to Local Street (LS), Primary Street (PS), Minor Highway (mH), and Major Highway (MH). LS can only be raised (+1) since already the lowest priority of the main routable road types. Locks the segment for some editing attributes unless the editor is R4+. Should only be used with concurrence of the State Managers. Recommend having a map comment explaining why the preference is changed.