Specifies the available list of enumerations ISAD levels ISADLevelCode ISAD A – Cooperative manoeuvres: Same as B, plus the infrastructure is capable of perceiving vehicle trajectories and guide AVs in order to optimize the traffic flow similar to C-ITS Day 2+ services. A ISAD B – Cooperative perception: Same as C, plus the infrastructure is capable of perceiving small traffic situations like C-ITS Day 1 services and relay the information to the AVs. B ISAD C – Dynamic digital Information: Same as D plus dynamic information like traffic light status, variable speed limits, lane directions, road closures, short-term road works. C ISAD D – Static digital information: Digital maps including static road signs are provided to the AVs.. D ISAD E – Conventional road infrastructure: No AV support. E