Laying the tracks

You can see the Homasote roadbed and the ties and ballast following the removal of the rails,  note the 1/4" underlayment has now been glued to 1/2" ply.  The 1/2" ply is directly on the open benchwork but once the track is completed and runs fine it will be elevated with uprights from the grid.  You can also see the numerous spikes laying beside the roadbed, as with the rail the spikes were re-installed.

The open section in the middle is where the long bridge will go.