wheel spin and braking

[azurecgi]

Hi I'm producing a car animation that will have lots of frenetic turns, braking and wheel spinning/skidding.

Is there a way to extract this information from the car rig automatically?

For example, when I hit the brakes, can a null move or rotate or something so I can link it to the brake lights via an expression?

Can a similar thing (null movement/rotation) be linked to each wheel to know when it is skidding or spinning which I could then link to particle expression for tyre smoke?

Thanks