Department of Transportation has migrated to the Iowa Statewide Interoperable Communications System (ISICS)
https://www.radioreference.com/apps/db/?sid=8734
See Wiki for district map
Frequencies
Department of Transportation
Operations
All operations now on ISICS. Old VHF P25 Repeaters and information has been archived in the wiki.
| Iowa Statewide Interoperable Communications System (ISICS) Project 25 Phase II | Operations |