In message , at 14:24:56 on
Fri, 7 Dec 2018, Recliner remarked:
It's been said that if in a situation of gridlock on a stretch of road,
the cars would communicate with each other to decide a priority to
proceed.

Would they use the phone network or, much more probably, some sort of
short range digital radio?

Local chatter on bluetooth? How would each vehicle authenticate itself
sufficiently well to act on its own initiative, if the ultimate control
was supposed to be in the [national] cloud?

That's a more immediately real time situation than still importantly
attempting to avoid obstructions occurring at short notice such as RTAs,
and this week Network Rail closing the A10 level crossing at Littleport
for hours, so they could get machinery in place to fix a broken rail.

I wonder if that sort of information could not also be broadcast like
traffic alerts are now?

Using what radio spectrum? Not O2 yesterday, obviously.
--
Roland Perry