Can cellphones handle vehicle-to-vehicle comms better than radio networks?

It's going to be a long time before DSRC-equipped vehicles are common on our roads.

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Please don't use cellular networks for V2V at least not in the US. I don't trust cellular companies in the US to not exert a monopoly tax on every car. They would love nothing more than to collect $20 per month from every car on the road (~100M vehicles) in perpetuity.'

If you want to put LTE in a car for optional infotainment purposes then go ahead but please don't start trying in vital public safety systems into that connection.