Cars, etc.

[Bob Zumbrunnen]

re: with hydraulics [there] are two separate systems

Is that mandated by law in USA cars?

No idea, but it's a good idea. I'm sure the most frequent point of failure in the hydraulic systems is caliper seals and unless you ignore the increased pedal travel long enough to drain the reservoir, you can still make a LOT of stops.

The electronic wedge brake in action Video mpg (28 MB)

Someday I'll download the video and watch.

If you're like me, that'll be when I've got a nearly infinite amount of time and bandwidth on my hands.