Not sure if this has been posted elsewhere but the following link is a pretty interesting article by the NY Times on the Santo Domingo Metro.
http://www.nytimes.com/2007/09/03/w...o.html?_r=2&ref=world&oref=slogin&oref=slogin
http://www.nytimes.com/2007/09/03/w...o.html?_r=2&ref=world&oref=slogin&oref=slogin