[Gaz64]

I don't think you will replicate the equivalent of Electronic Stability Control, (ESC) without measuring ALL wheel speeds.

Using Driveshaft rpm, or Crankshaft rpm as a single channel input is as about as good as Bosch 3 channel ABS with 1 channel looking at the rear axle.

How are you going to control a road car that is going out of control, sliding in wet conditions with an slightly inexperienced driver?

Until you have a system that can apply braking pressure to individual wheels, from a module that senses G force in 4 directions, (multi axis sensor), then you won't have what the DMV wants.

I've driven on skid pans with ESC turned on and off.
For the majority out there, thank goodness the default is ON in most cars these days.

Just for the record, I gave to your fund to fight these guys.

Gary