This isn't a long range save, but something interesting I thought worth mentioning...
I was in traffic (an S10 pickup had rear ended a school bus, traffic was way backed up), behind a big postal truck. Not an 18 wheeler but not the small postal carrier vehicle, much bigger than an SUV.
My Pro 78 instantly goes to level 9 KA alert for about 10 seconds straight, staying on 9 then dropping off completely. I look around for other RD users (wasn't expecting a cop to be radaring traffic that is standing still), didn't see any other RD users. The light turns green and everyone starts to go slowly, my RD comes back with a 9 alert for about 5 seconds, then goes quiet. Once the truck in front of me moves up, I see coming in the opposite direction a police Impala, looks like he was doing IO radar on cross traffic.
I was impressed at how well it picked up the signal (full strength) while I was behind a massive truck blocking my view across the intersection, and with cars crossing between me and the LEO.