The calculation for sufficiency rating is based on many factors beyond structure condition, including detour length, average daily traffic, approach roadway width, highway designation, etc. The previous version of Trans 213 allowed for rehabilitation of structures with a sufficiency rating of 80 or less, and replacement for structures with a sufficiency rating of 50 or less. This led to some situations where a structure in need of replacement maintained a sufficiency rating that was not, and would never be, below 50. The reverse situation also occurred resulting in a sufficiency rating of less than 50 for structures that did not need replacement.
Sufficiency ratings are no longer used nationally. This calculated rating system was maintained in Wisconsin due to the previous language in Trans 213 that defined how bridges were eligible for the local bridge assistance program. The revisions to Trans 213 eligibility criteria better align with modern national asset management practices.