Paving for Rochelle Global III

I've been doing a ton of ballasting this summer.  So much that the only ballasting left to do is the Rochelle Global III Intermodal Yard.  Ballasting in the yard will look better if done after the paving of the intermodal lot.  So, it looks like paving Global III is the next project for the layout.  The prototype lot has both concrete and asphalt paving as shown in the photo below.  There is concrete paving in between and next to the loading/unloading tracks and asphalt elsewhere.

On the layout, I am using styrene sheets for the concrete and Woodland Scenics "Smooth-It" for the asphalt.  The styrene sheets are .030" thick.  At this thickness the sheets lay just below the rails when setting on top the plactic spikeheads of the ME code 55 flextrack.  I then used a second .030 sheet underneath the the top sheet so that the sheets slope ever so slightly away from the rails.  .030 sheet was also used between the tracks.  Next I will be using .040 sheets for between the rails.