Premium Content Subscriber only TRANSPORT and Main Roads are no closer to being able to tell frustrated motorists when the Redbank Plains overpass will be reopened, two weeks after a truck carrying an excavator damaged two girders on the bridge. The major link between Blackstone and Redbank Plains was cut off on March 1, when part of the excavator smashed into the concrete girders at three separate locations along the Cunningham Highway. Since then, motorists have been forced to take a lengthy detour in order to switch to the opposite side of the highway, potentially adding 10 minutes to their travel time, depending on traffic congestion.