What are the pros/cons of both wooden ties and concrete? Barring them from being destroyed from a derailment or weather what is their life expectancy respectively?
The topic has come up several times - but the Mudchickens of the world can help enlighten you to current thinking.
Here’s a sampling of some of what’s been discussed before: http://www.trains.com/TRC/CS/search/SearchResults.aspx?q=Railroad%20Ties&f=MTEx&u=