I can still remember Trolley cars in Chicago, they ran in the streets, yes they were on tracks, last one on Clark street.
I am building a new layout, from ground up, literally.  new addition to work room 12X16 exterior numbers, and it will be all train, leaning to around the wall type.
thats the back ground, now here is the topic
3 rail track for trolleys, how would one make a 3 rail track "in concrete" as it was done "In the Days"
never ever saw ties,  just track, lots of them, all in the street, probably a ton of dollars worth of scrap sitting in the streets of Chicago as we speak.
but back to the topic,  for realism no ties would ever been seen, i sure do not remember them and if one went to clark street in Chicago they probably are still there.
so how does one make that realistic move to re birth an era?
would have loved to see a trolly going by this corner