The concept design for Lilian Ngoyi Street (formerly Bree Street) is under way after the deadly explosion on 19 July ripped up over 400m of the road and destroyed underground infrastructure.
The blast occurred just after 17:00 after methane gas bubbled to the highest point of the cavity under the road.
The gas was trapped in the tunnel because the manholes were welded shut to prevent cable theft, and a spark from an unknown origin ignited it.