Your post heading was changed in your later reply; now I understand what you're asking.
"Conditions" cars are deployed on a per-tour basis by commands (i.e.: a precinct, transit district, housing PSA, highway unit, etc.) that wish to address specific conditions within their commands. For example, a Highway RMP might be assigned to a specific segment of a roadway due to multiple excessive speed complaints could be referred to a "3 Conditions" over the air.