Connected vehicle corridors are becoming as renowned for the proxy war being fought between the WiFi and cellular camps as for the more interesting higher level V2X communications and overlying applications. Each side pumps out propaganda highlighting its supposed benefits or greater maturity, while warning that more accidents are likely if the other is adopted. The UK’s first significant connected vehicle pilot, for which Costain has just won the contract, is therefore notable for running with the WiFi option IEEE 802.11p, also known as DSRC or ITS-G5. The cellular option is 3GPP LTE-V2X PC5, also referred to as LTE side-link or sometimes, especially in the US, just as C2VX. Both operate in the 5.9 GHz band for the provision of…