The roadside unit according to an embodiment of the present disclosure may include a WAVE-V2X antenna for transceiving a WAVE-V2X signal, an LTE-V2X antenna for transceiving an LTE-V2X signal, an LTE antenna for transceiving an LTE signal, a GNSS antenna for transceiving a GNSS signal, a WAVE-V2X communication module for demodulating the WAVE-V2X signal received through the WAVE-V2X antenna to obtain WAVE-V2X communication information, and for modulating the WAVE-V2X communication information to generate the WAVE-V2X signal, an LTE-V2X communication module for demodulating the LTE-V2X signal received through the LTE-V2X antenna to obtain LTE-V2X communication information, and for modulating the LTE-V2X communication information to generate the LTE-V2X signal, a GNSS module for processing the GNSS signal received through the GNSS antenna to obtain location information of the roadside unit, an LTE module for processing the LTE signal received through the LTE antenna to obtain additional information for operation of the roadside unit, and for transmitting the WAVE-V2X communication information or the LTE-V2X communication information and the location information of the roadside unit to an external central control server through the LTE antenna, and/or a controller for determining a signal having a greater intensity of the WAVE-V2X signal received through the WAVE-V2X antenna and the LTE-V2X signal received through the LTE-V2X antenna, and for controlling the WAVE-V2X communication module and the LTE-V2X communication module to process only the one determined signal.