INFORMATION PROVIDING SYSTEM, SERVER, ONBOARD DEVICE, STORAGE MEDIUM, AND INFORMATION PROVIDING METHOD

An information providing system includes a server and an onboard device configured to transmit and receive information to and from the server. The onboard device includes an imaging unit configured to image a nearby vehicle and a first transmission unit configured to transmit nearby vehicle information including a captured image of the nearby vehicle or dangerous vehicle information including a position of a dangerous vehicle which is detected from the nearby vehicle information and position information of the onboard device to the server. The server includes a warning unit configured to generate warning information including the position of the dangerous vehicle for a vehicle near the dangerous vehicle and a second transmission unit configured to transmit the warning information.