April 15. 2006: The segment of Yamato Gose Road between Koriyama Minami Interchange and Kashihara Kita Interchange (except for Miyake Interchange and Tawaramoto Interchange) and the ground road from Koriyama Interchange of Nishimeihan Jidoshado Expressway (Nara Prefecture) to Koriyama-minami IC were opened.
2006年（平成18年）4月15日：大和御所道路・三宅ICと田原本ICを除いて郡山南IC～橿原北IC開通、西名阪自動車道郡山インターチェンジ(奈良県)～郡山南IC間の平面部分開通。