Hiya -- I did go searching for previous threads about this, but found nothing. If I'm asking a question on a previously covered topic, my apologies, I'm a n00b to the forums. :roll:
Part of my weekly commute is traveling the I-90 Cascade passes in Washington state. On the way up to Snoqualmie Pass (either direction), there's lots of digital traffic signs -- the kinds that post the revised speed limit, and "warn" you that the reason you've been stopped three-quarters up a frozen mountain for the last hour is because of a jack-knifed semi-truck in the opposite lanes (but I digress)....
As I approach each and everyone on of those digital signs, the X-band warning goes goes on my RD. Each sign is equipped with two antenna (one facing east, the other west) that looks exactly like a high-gain 802.11<foo> antenna.
My assumption is that the state has set up a wireless network using X-band frequencies to update the signs, but I can't rule out the possibility that they might just have lots of drones attached to the signs.
Can anyone confirm this?