The only thing I've ever been able to dig up that's relatively recent is this image, which I got directly from the NOPB:
What's interesting is that the NOPB/Norfolk Southern tracks would run directly into the end of the current Riverfront streetcar line (see both my previous post as well as that of the UNOP light rail route that blackcoat illustrated in the previous post). We already have the rights-of-way in public ownership, and they're graded and outside of automobile traffic, to boot. That is ideal--akin to what the el is in Chicago, or Philly's aboveground lines, and even better than Boston's T Greenline. If we only had people who would go to bat for it at the RPC, NOPB, CPC, etc. Our streetcar's two biggest failings are that they are relatively slow, and they don't circumnavigate the city. The NOPB route could kill both those birds, and have plenty of ancillary benefits as well (park n rides within the city--for instance, at City Park--could provide City Park with much-needed revenue).
Another note I'd like to add to this discussion: In addition to New Orleans having the most Class I railroads in the country, we also have the most intercontinental Amtrak routes (three)--the Crescent (to New York), the City of New Orleans (to Chicago), and the Sunset Limited (to LA)--moving right through our dinky UPT. I'll just say that we need to break out of the mindset of high speed rail just moving along the Gulf. The Illinois Central has long-connected New Orleans to the Midwest, and we need to think of ourselves as the spine of the country. The Illinois Central connects New Orleans to Jackson, Memphis, St. Louis, Chicago, Minneapolis, and (because it is owned by CN) Toronto and on to Montreal. We need to think N-S in addition to E-W, which would place New Orleans at the intersection of an inverted T that has a total population of more than 70M people. Look what Houston DOESN'T have the we still do, and that is one HELL of a competitive advantage: