A hub-mountable wheel-rotation detector has an electromagnetic generator to convert rotational mechanical energy into electrical energy sufficient to recharge an internal rechargeable battery and power internal alarm and distance-tracking circuitry. The detector provides a combination of backup alarm and hubodometer functionality in a common device.

A reflector unit may behave as a retroreflector to reflect light of a selected color. The reflector unit may comprise a first reflector having a first color, a second reflector having a second color, and a mask that either allows incoming light to reach the first reflector and not the second reflector or allows incoming light to reach the second reflector and not the first reflector. An active light unit may emit light of a particular color in response to receiving light. In this fashion, the active light unit may simulate the operation of a reflector. The reflector unit and the active light unit may operate on a bi-directional vehicle.

A vehicle headlight device includes optical systems that are respectively provided to light sources, and illuminate ahead of a vehicle by light emitted from the light sources, with light distribution patterns of which illuminating areas are offset to each other at least in vertical directions, a stoppable distance calculator that calculates a stoppable distance of the vehicle, and a light source controller that controls the light sources to be turned on and off so that an area ahead of the vehicle and away from the vehicle by the stoppable distance is illuminated by at least one of the optical systems.

A vehicle headlamp device includes a headlamp unit, a light distribution direction changer, a traveling state changer, and an arithmetic controller. The headlamp unit is configured to illuminate an area ahead of a vehicle. The light distribution direction changer is configured to change a light distribution direction of the headlamp unit. The traveling state changer is configured to change a traveling state of the vehicle. The arithmetic controller is configured to, upon detecting a backward movement of the vehicle due to an operation received by the traveling state changer, cause the light distribution direction changer to change the light distribution direction of the headlamp unit more outward in a vehicle width direction of the vehicle than in a normal traveling state.

An inertial measurement sensor system of a vehicle is calibrated during a driving operation of the vehicle and is based on a determination of a misalignment of a sensor coordinate system of the inertial measurement sensor system with respect to a vehicle coordinate system. The determination of the misalignment is interrupted in situations in which a level deviation from a reference level exceeding a predetermined threshold value is determined by means of at least one of the vehicle's own level sensors.

A lighting device is provided for controlling the photometric distribution of light emitted by two or more LEDs. The lighting device may be integrated with a control system of the vehicle and may be controlled by a remote controller. The lighting device may be capable of being operated in one or more modes of operation based on operating conditions, user input, or both. Operating conditions may include vehicle conditions, environmental conditions, and user conditions. The controller may operate a software application to enable the user to modify, control, or otherwise regulate any mode of operation or other feature of the lighting system.

A lighting device is provided for controlling the photometric distribution of light emitted by two or more LEDs. The lighting device may be integrated with a control system of the vehicle and may be controlled by a remote controller. The lighting device may be capable of being operated in one or more modes of operation based on operating conditions, user input, or both. Operating conditions may include vehicle conditions, environmental conditions, and user conditions. The controller may operate a software application to enable the user to modify, control, or otherwise regulate any mode of operation or other feature of the lighting system.