A report by the WAG in 2003 discussed access to CIA and the tone of the report indicates that they consider CIA to be a major destination although they do not specifically state that The tail end of the report mentions that the contractors preferred option is a new trunk road toward the CIA section 4 6 3 and that the route to the airport both in the short and longer term proposals be considered for adoption as a trunk road section 5 I don t know of further developments since this Also the map s data is as of 2002 and may not be current It s been a while since I drove along the M4 does anyone recall if distance markers or whatever the technical name for the signs list distances to CIA as well as other locations I know that CIA is signposted but so is Cardiff Bay use junction 32 for the Bay which I m sure we agree does not warrant being listed separately