Thank you all forthe feedback
Indeed I had in mind an aftermarket sensor (radar on a chip? I read in PopSci decades ago that those will be common soon) and how to adapt it for safe and/or legal distance drafting.
A new, advanced car is not an option for me. Not to mention that their distance sensors must be soooo integrated into other electronics and features that it would be impossible to hack to our preferences.
In general I do not expect to make and use such a sensor, only wanted to open discussion in case it may inspire someone. Unless such a sensor would be exceptionally easy to concoct, then I might...
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is
where you're going, not
how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread