Witnesses heard a "huge sound of impact, like metal being compacted" and rushed to help after a twin-cab ute driven by a Canberran smashed into the back of a B-double fuel tanker.
The electricians were working on a nearby Bywong property around 9.40am on Wednesday. The incident happened on the Federal Highway southbound between Donnelly Road and Macs Reef Road, about 7km from the ACT border.