I liked the GhengisFarb's idea about railroad modification very much. But it seemed to me a little bit urbanious and messy. And I decided to adjust the file. I retained the countryside patterns intact and heaviely modified the urban areas. In comparision vs original, I also created much more different patterns and added a trees. 
BUT I have no idea how to upload it. Limit is too small !!!
http://www.civfanatics.net/uploads2/railroads.pcx

BUT I have no idea how to upload it. Limit is too small !!!

http://www.civfanatics.net/uploads2/railroads.pcx