With the 'Adaptive Cruise Control' (car uses radar to slow and speed-up in response to traffic in front) becoming fairly prevalent in cars these days (eg. Volkswagon Golf, Ford Focus) does anyone know of the reliability of these with a car approaching a motorcyclist? With our small cross section from behind (around 40-80cm generally), I wonder if these radar's will reliably (read: always) pickup a motorcyclist in front? Or should we now be extra concerned about being rammed from behind? Anyone have any first hand knowledge or experience with these Adaptive Cruise Control's and a motorbike?