Method for transmitting message by V2X UE in wireless communication system and device therefor

A method by a first vehicle-to-everything user equipment (V2X UE) comprising:

• obtaining status information related to the first V2X UE;
• and
• transmitting a message based on the status information,
• wherein the status information comprises mobility information for the first V2X UE, mobility change information for the first V2X UE, internal status information for the first V2X UE, and station type information,
• wherein the first V2X UE quantifies the mobility information into a first severity level, quantifies the mobility change information into a second severity level, and quantifies the internal status information into a third severity level,
• wherein each of the first severity level, second severity level, and third severity level is applied with a weight determined based on the station type information,
• wherein the first V2X UE determines one transmission mode among a plurality of preconfigured transmission modes based on the first severity level, and
• wherein the message is transmitted based on transmission and reception intervals and transmission power configured for the one transmission mode.