I was inching my CRV toward my wife's Prius, in our tandem driveway. I expected the CMBS to beep at me and stop me from making contact with her rear bumper, but it did nto make a peep (I stopped and saw there was about 4 inches between the cars). In her Prius (2017), it will beep and stop the car from making contact (full braking at about 6 inches), so I expected the same on the Honda. Does anyone know if there is a speed cutoff, where the system will not engage? Thanks!