Abstract: Provided herein are park socket systems for drive-off prevention having a park socket positioned on a tractor and sized to receive a trailer-side connector plug of a connector cable and/or a trailer-side pneumatic coupling of a pneumatic line, a socket sensor configured to detect a presence or absence of the trailer-side connector plug and/or the trailer-side pneumatic coupling in the park socket, and a tractor controller configured, responsive to a detected absence of the trailer-side connector plug and/or the trailer-side pneumatic coupling within the park socket, to restrict movement of the tractor.

Abstract: Provided herein are functional indicator systems for tractor trailer connection having a first connector socket positioned on a tractor and/or a trailer and sized to receive a first connector plug forming a first end of a connector cable, one or more socket function sensors configured to detect a presence or absence of one or more electrical or communications functionalities in a corresponding second connector socket positioned on a tractor or trailer connected to a second connector plug forming a second end of the electrical cable, and an indicator display in electronic communication with the one or more socket function sensors, the indicator display configured to visually indicate the detected presence or absence of the one or more electrical or communications functionalities.

Abstract: A lighting apparatus emitting polychromatic light comprising light of at least two light-channels with different colors, wherein each light-channel is controlled by one modified pulse-width-modulated signal (modified PWM-signal), and each modified PWM-signal results from the modulation of one color-pulse-width-modulated signal (color-PWM-signal) with an intensity-pulse-width-modulated signal (intensity-PWM-signal) in order to control the brightness and color location of the polychromatic light.