The bridge on the M42 set to be demolished. The bridge on the M42 set to be demolished. Inspectors assess some of the defects under the bridgeInspectors assess some of the defects under the bridgeAN AGEING bridge over the M42 at Junction 6 which had to be closed to traffic is to be demolished. But the bridge had to be closed in July after further deterioration was identified. Plans are now being developed for a temporary bridge to be introduced at the junction until a replacement structure can be installed.