- 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 , , , , and . can only be raised (+1) since already the lowest priority of the main routable road types. Similarly can only be lowered (-1) since already the highest priority of the main routable road types. Note is automatically given +1 routing preference by WME after a segment is saved; but it has no effect since is already the highest priority. Selecting this attribute locks the segment(s) 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.