I won't to know why it's not mandatory for all newly manufactured vehicles to have the computerized blind spot assistance (bsa) system installed? this system must be mandatory the same as seatbelts and airbags. vehicles such as the nissans have advanced warning systems for blind spots. countless motor vehicles accidents happen daily because drivers can't properly see existing traffic prior to changing lanes due to side mirror blind spots. the dual/double side mirror must be made available so the dealers or the individual can remove/replace all existing mirrors. it needs to be mandatory for current owners of all vehicles being driven to have at least the dual/split mirror. this safety requirement will save countless lives each day. these warning systems should not be a luxury for only the rich. every life matters. the technology is there and must be used to help save lives. please pass this on to whom ever can make a difference for change.