This document provides specifications of a communication interface (CI) named "ITS-M5". The name "ITS-M5" indicates microwave frequency bands in the range of 5 GHz.

ITS-M5 CIs are based on the wireless LAN technology standardized at IEEE. This document specifies the additions to and deviations from IEEE Std 802.11™-2016 required to make ITS-M5 CIs compatible with the ITS station and communication architecture specified in ISO 21217.