eli5, Who controls emergency signs on highways? Are they connected to the internet?

Question

I’ve seen this signage before, but I’ve never thought about how these signs get updated throughout the whole state instantly. TIA!

In: 2

Answer 1

The standalone ones for long-term road construction are typically just that – stand-alone, programmed to display the same info repeatedly for the X months of construction. Sometimes during a project they’ll move them and make them say a different thing.

The larger displays over the highway that display estimated drive times, amber alerts, accidents, etc are networked, typically controlled by the state department of transportation or other similar authority.