Sandhouse Gang had George Hamlin recently with a 500 photo slide show. I failed to make it but it was available on the Sandhouse Gang Board (transportation.northwestner.edu). I am not savvy enough to post the site here, but am sure others will.
The downloaded file is huge, but the time to go thru all 500 slides was well worth it. Coverage is from New York Central in 1960s, Chicago in 1970s, Houston in 80s, Atlanta in 90s, and DC/Virginia in the 2000s.
This is one very talented photographer. If you have 30 minutes (or more) give it a look. Dont think you will be disappointed.
Ed