Decided to Jam on over to Louisville after Oldham county. Someone gave me my a tip that one of the 3T22's in Jefferson county's system did Hi/Lo and I jumped on the opportunity to hear my first Hi/Lo signal. This faded yellow 3T22 is located atop the Highview fire station off of 864. I believe this is the only siren that does hi lo in the system. It's one of the few roof mounted sirens in the system as well. Louisville test on the second Tuesday of the month at 12 Noon.