A radar reflective vehicle breakdown warning sign comprises primarily a body and a projecting lamp, and a remote control for connecting to the body and the projecting lamp. In an interior of the body is disposed a control circuit and a transmission component connected to the control circuit. The transmission component is pivotally connected to a vehicle breakdown warning sign. On the vehicle breakdown warning sign are disposed radar wave reflecting patches which may reflect the radar waves emitted by a vehicle with an autonomous driving function. In an interior of the projecting lamp is disposed a control circuit and a light emitting component connected to the control circuit.

A radar reflective vehicle breakdown warning sign comprises primarily a body and a projecting lamp, and a remote control for connecting to the body and the projecting lamp. In an interior of the body is disposed a control circuit and a transmission component connected to the control circuit. The transmission component is pivotally connected to a vehicle breakdown warning sign. On the vehicle breakdown warning sign are disposed radar wave reflecting patches which may reflect the radar waves emitted by a vehicle with an autonomous driving function. In an interior of the projecting lamp is disposed a control circuit and a light emitting component connected to the control circuit.

There is provided an unmanned roadside signage vehicle comprising an autonomous, semiautonomous and/or remotely controllable roadside signage vehicle for various roadside signage, emergency response and maintenance applications. In accordance with one aspect, the unmanned roadside signage vehicle comprises drive motors operably coupled to driven wheels; steering coupled to the driven wheels; a controller for controlling the drive motors and steering; at least one electronic signage board for displaying roadside signage; and a data interface for receiving at least remote control instructions, the data interface operably coupled to the controller and wherein the controller is configured for controlling the drive motors and steering in accordance with the remote control instructions.

There is provided an unmanned roadside signage vehicle comprising an autonomous, semiautonomous and/or remotely controllable roadside signage vehicle for various roadside signage, emergency response and maintenance applications. In accordance with one aspect, the unmanned roadside signage vehicle comprises drive motors operably coupled to driven wheels; steering coupled to the driven wheels; a controller for controlling the drive motors and steering; at least one electronic signage board for displaying roadside signage; and a data interface for receiving at least remote control instructions, the data interface operably coupled to the controller and wherein the controller is configured for controlling the drive motors and steering in accordance with the remote control instructions.

A mobile warning device on a vehicle includes a detecting module, a driving module, a monitoring module, and a communication module. The detecting module determines whether the vehicle is unexpectedly immobile. The driving module is detachably set on the vehicle to detach and move the warning device to a specified position when the vehicle is immobile. The monitoring module is used to collect information around the vehicle. The communication module is used to transmit signals between the vehicle, the warning device, and a cloud network.

A mobile warning device on a vehicle includes a detecting module, a driving module, a monitoring module, and a communication module. The detecting module determines whether the vehicle is unexpectedly immobile. The driving module is detachably set on the vehicle to detach and move the warning device to a specified position when the vehicle is immobile. The monitoring module is used to collect information around the vehicle. The communication module is used to transmit signals between the vehicle, the warning device, and a cloud network.

A method for controlling the motion of a mobile warning triangle for suitable placement on a roadway acquires information as to color of the lane markings detected by a sensor. When the mobile warning triangle is first placed on the roadway, the sensor is preset in position to detect the lane marking. White or yellow color information of the lane marking or of the black-colored roadway are detected or are not detected by the sensor, and deviations from a required path are recognized when different colors are received in certain combinations by the sensor. If no deviation is recognized in the colors, the mobile warning triangle continues moving forward. If a deviation in colors is recognized, the mobile warning triangle is controlled to hunt to the left and right through one or more predetermined angles to try to detect or redetect the lane marking.

A method for controlling the motion of a mobile warning triangle for suitable placement on a roadway acquires information as to color of the lane markings detected by a sensor. When the mobile warning triangle is first placed on the roadway, the sensor is preset in position to detect the lane marking. White or yellow color information of the lane marking or of the black-colored roadway are detected or are not detected by the sensor, and deviations from a required path are recognized when different colors are received in certain combinations by the sensor. If no deviation is recognized in the colors, the mobile warning triangle continues moving forward. If a deviation in colors is recognized, the mobile warning triangle is controlled to hunt to the left and right through one or more predetermined angles to try to detect or redetect the lane marking.

A road traffic warning device includes a base, a cover body mounted on the base, and a collapsible warning frame mounted to the cover body. The base includes a controlling module. A folded triangular collapsible warning frame can be unfolded out of the cover body to create the warning device. Two wheels are mounted to two side of the base. The controlling module is configured to control the wheels to move the warning device to an effective warning position.

A warning system for a vehicle includes a mobile warning tripod and a portable electronic device communicating with the tripod. The tripod includes a driving unit, a movement unit, and a warning unit. The electronic device has an application with a user interface. The user interface includes icons to control a movement control unit in the electronic device. The movement control unit sends control signals to the driving unit of the tripod in response to user operations on one or more of the icons. The driving unit moves the tripod to move as required. A vehicle warning method is also disclosed.