I am interested in building a layout of city trains and /or "EL' trains, where can I find information on this in "N" scale?
here http://www.trolleyville.com/trolleyville.shtml (http://www.trolleyville.com/trolleyville.shtml)
or here http://www.eastpenn.org/links.html#modtrol (http://www.eastpenn.org/links.html#modtrol)
Lots of "N" specific information here:
http://www.teamsavage.com/ncat/ncat.html
Don't forget Google.
http://www.google.com/search?hl=en&q=n+scale+subway&btnG=Search
Have fun.
Rich