Wrong!

Instead of
49.Take exit 有料道路大竹ＩＣ to merge onto 広島岩国道路 Toll road
12.6 km

he should actually take

49.Take exit 中大島口路ＩＪ to merge onto 広島岩国道路 Toll road
8.4 km

its much shorter and will cut down his trip considerably.