Nebraska is following the Functional Classification (FC) system for the USA.
The Nebraska Department of Roads has released functional classification maps for all counties and cities within counties.
In Nebraska, we observe a minimum standard for locking roads based on segment type. Any road of a certain segment type must be locked at least to the rank listed in the chart below. Roads may be locked higher for protection and special situations (construction, confusing design, frequent mistakes, image inaccuracies, etc.), but should not be locked lower.
Although common practice is to limit editing freeways to rank 5 or higher, we have determined that the experience required to reach editing rank 4 is sufficient to gain the privilege of editing freeway segments.