[Mobile-Portable] HTX-10 and speed limit light noise

[Jeff, Julie, Annabelle, and Nicholas]

Hello, all.  As I was driving around yesterday with my HTX-10, I came upon 
one of those speed limit warning signs.  It has 2 flashing yellow lights 
that activate when a vehicle comes close, over a 25 MPH sign.  The sign is 
here because the road goes from 40 to 25 very quickly.  The sign also has 
what I think are solar panels on top to keep the battery/ies 
recharged.  Anyway, as I approach the sign, the yellow lights start to 
flash, and at the same time, in sync with the alternating flashing yellow 
lights, I get loud bursts of static on the HTX-10!  It even continued for a 
few seconds after I passed the sign.  I've never had any bursts of static 
or noise like this with any other traffic/signal/warning lights.  I haven't 
come across any railroad crossings yet though, so I don't know if the 
alternating flashing lights there would cause the same thing.  Anyone got 
any ideas?

Thanks and 73,

Jeff, KF4KWO