Locking Rank
In Maryland we have a set minimum standard for locking roads based on segment type. Any road of a certain segment type must be locked at least to the rank (level) in the chart below. Roads may be locked higher for protection and special situations (areas with construction, tricky design, frequent mistakes, imaging inaccuracies, and the like), but should not be locked lower.
A great time to implement these locks is while bringing the road types of an area into compliance with the current US road type standards (FC and highway systems). Lock the roads based on type after they've been set to current US road type standards.
| Segment Type | Urban | Rural | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Freeway | 5 | 4 | |||||||||
| Ramp | 5 | 4 | |||||||||
| Major Highway | 3 | 2 | |||||||||
| Minor Highway | 2 | ||||||||||
| Primary Street | 2 | ||||||||||
| Street | 1 | ||||||||||
| • • • • Ferry • • • • | 5 | ||||||||||
| |-|-|-|-|-|-|-|-|-| Railroad |-|-|-|-|-|-|-|-|-| | 2 | ||||||||||
Note that these are minimums and, for protection, certain segments may be at higher lock levels. If you find a road locked to a higher level than its minimum, please leave it locked no lower than that level when you have finished editing.
See Maryland/Major roads for guidance in Maryland that may not be universal to all other states and territories.