- Issued 5/24 WSDB710 from FCC Application 0011060657 statewide for IDOT staff, small scale construction sites on flagging of traffic on US and State Highways (on a secondary basis) (will monitor for traffic and select a different frequency if in use)
- 150-2W Portables on 453.3625, 453.4625, 453.5125, 453.5375, 453.6875, 453.7125, 458.3625, 458.4625, 458.5125, 458.5375, 458.6875, 458.7125 (NFM/P25)
Some of these frequencies have already been known to be in use for years and been licensed under other call signs, that have expired.
Illinois Department of Transportation (IDOT) (Illinois) Scanner Frequencies and Radio Frequency Reference IDOT Page
