Premium Content Subscriber only MOTORISTS frustrated by delays caused by the closure of the eastbound lane of a busy overpass on the Cunningham Highway aren’t likely to find any relief soon with repair designs still not finalised. The Department of Transport and Main Roads says it cannot yet release a time frame on when repair work to the Redbank Plains Road overpass at Blackstone will begin, more than two months after it was damaged. A truck carrying an excavator damaged two girders on the bridge when it crashed into the overpass on March 1. The same vehicle hit the Aberdare Road overpass at Dinmore on the same day.