David Van Horn wrote:

>>I see no way to differentiate between braking and going downhill. Any
>>ideas ?
>>    
>>
>
>Good luck. That's one of those basic physics problems. You can't
>differentiate gravity from acceleration (negative, in this case).
>
>You can measure pressure in the brake lines though, which should do the
>job.
>
>
>
>
>  
>
Surely you are braking when the brakelight is turned on, which you can 
detect, since you are attached to the brakelight - or am I totally out 
to lunch?

David


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