I am after some help from my knowledgeable audience.
Referring to the photo below, it shows a section of the New England Highway at Doughboy Hollow between Kankool and Ardglen.
At this location on Google Maps, a small creek/watershed is shown to flow underneath the railway embankment and also pass under the highway where the ARMCO barrier is. My question is how would the highway have crossed this waterway? Concrete pipes, box culverts or what? I am also presuming there would have been some sort of culvert in the embankment.
Is this likely to have been brick or concrete?