Back in the 1970's when I was a kid, they tore up Morris Avenue in Union NJ (I think Route 28 or 82) and under the pavement were trolley tracks. I heard they once went to Elizabeth NJ and when they passed the Kean mansion, they actually had to run behind the mansion instead of staying on Morris Ave. Can anyone confirm?? I also remember the remnants of a car barn in Westfield NJ in the 1980's. I think it was converted into a girl scout building of some sort. Once again, can anyone confirm??
As far as the tracks in Morris Ave. in Union, they would have been the Morris County Traction line.
An interurban line of sorts. The line connected Elizabeth, Conn. Farms (Union), Springfield, Summit, Morristown and as far as Lake Hopatcong. The line used Public Service tracks from the arches in Elizabeth to the City Line. From the City line west it ran on its own tracks in Morris Ave or on private ROW parallel to Morris Ave. They did not run the big interurban cars that the midwest is famous for. Actually thay ran some real oddballs with three axels.
Have not been able to locate a fine detailed map of the area. But an old county map I once saw show it in the street at Morris and North Aves. near the mansion.