CATAIR offers two types of membership. The REGULAR MEMBER is a member who has successfully completed courses in Traffic Accident Analysis (Level III) or Reconstruction (Level IV), or has expertise that would qualify the applicant to be accepted as an expert in civil or criminal litigation. The ASSOCIATE MEMBER is a member, such as fleet safety personnel, on-scene investigators, medical doctors, traffic safety instructors, or lawyers who have a professional interest in traffic accidents or traffic safety.