Update MHN Base Year (Utilities) Tool

This tool will copy an MHN geodatabase and build it to its coded state for a new base year, leaving all bus routes and highway project coding (with completion years after the new base year) intact. Temporary CSVs containing attribute data for MHN links and highway project coding to be implemented by the specified year are generated.

After running this tool, The Incorporate Edits Tool must also be run on the output geodatabase to rebuild all of the relationship classes and ensure nodes, highway project geometries, etc. are correct. It is also recommended that bus itineraries be imported from scratch into the new geodatabase with the Import GTFS Bus Routes Tool.

The program process_highway_coding.sas is automatically called (via sasrun.bat) to update network attributes, add new links and delete old ones according to the temporary highway project coding CSVs.

It is important to note that, if a skeleton link (BASELINK = 0) is included in the coding for multiple highway projects, and if some but not all of those projects have a completion year after the new base year, the tool will run successfully but the output geodatabase will contain invalid highway project coding. The tool will automatically identify and report the specific projects (and specific links) with invalid coding. The coding for those projects should be exported from the input geodatabase (where it's still valid), modified to work with the updated network in the output geodatabase, and then imported into the output geodatabase.