Yes, that's the latest on the DLS (I am working on an update). I tried to find the spot in your image, but could not find it during a 'flyover' along the main line. When I came back to check your image I found it is no longer showing up, so I can't narrow down my search.
As has been stated above, lowering the 'Shader Quality' setting should provide a work around, at the cost of lowering overall graphics quality. If I've done my job as a route builder properly it should not be necessary.
My current WIP is a WeddinNSW PBR makeover, which will be released 'soon' (likely as a version V5.2). The conversion to PBR should also correct the issue you have raised.