A microelectromechanical switch is fabricated inexpensively by using processing steps which are standard for fabricating multiple metal layer integrated circuits, such as CMOS. One or more conditions associated with a data processing system are detected. The control is operable, responsive to the determined height dimension of a structure in the path of travel of the vehicle and a height dimension of the vehicle, to determine if there is sufficient clearance between the structure and the vehicle for the vehicle to pass under the structure. A plurality of bill passage sensors are sequentially disposed along the transport path that are adapted to detect the passage of a bill as each bill is transported past each sensor. The controller measures a magnitude of the acoustic impulse to be used as feedback in controlling the operation of the respective valve actuator, and provide softer landings of the valve. The emergency communication mode consists of forwarding user and live location information to a remote server and receiving emergency contact information, selected based on the user and live location information, for establishing a communication with emergency response personnel.