benefit will occur the controller 40 also accommodates for driver input such as pressure on the gas pedal or pressure on the brake the controller 40 also includes logic to manage the human machine interface hmi as well as logic for the range optimization estimator the output from which may be an optimal following speed such a module may optimize trailing distance against the speed of the in path vehicle and the host vehicle in determining a lower end of an optimal range of trailing distances for safety purposes the auto manufacture may elect to hard code a distance at which the system will not recommend a closer proximity to a leading vehicle even if the closer proximity were to have a greater fuel economy benefit an auto manufacturer may also elect to implement a formulaic approach for safety purposes such as not recommending a closer proximity to a leading vehicle than a one second following distance an auto manufacturer may also elect to disable the driver support system for slipstreaming including any display panels if any of the safety logic is breached by the driver that is the driver is too close to a leading vehicle or the driver is following a leading vehicle more closely than a one second following distance the controller 40 may also be in communication with a warning system the warning system may be activated if the driver breaches the safety logic logic for such a warning system may be a part of controller 40 or in any forward.