Re: Sound bites bite back
"I certainly think that the last 20 seconds of speed data should be transmitted along with the other information, and also the record of the "bums on seats" sensors and/or safety belts-buckled sensors."
This is why it's taken so long to get to this point and why the "bare minimum" of data has been agreed should be sent. It's to minimise any future feature creep. If, as you suggest, the data you list is sent because it might be useful, then even more data would be even more useful. Maybe it should have a built in GPS tracker and it could send the last 2 minutes of location data too? Or maybe the last hour, just in case you might have visited a pub. See where it leads when you want more?
As some ancient Chinese gentleman once said, "Be careful what you wish for. You might get it"