I have an arrow i am making and some of the scaffolding just barely intrudes in on the tunnel, but i think it should be ok since arrow trains don' allow you to put your hands up or to the side much and the intrusion is really close to the edge of the tunnel.
It intrudes on the 1.6 tunnels on the right side toward the top part. It will be fine. I am sure there are several real arrow rides that wouldn't pass tunnel testing so this will be fine.