If freight trains are limited to 10 mph over a wooden trestle, the route will need more investment. LOL. But it would probably be good for the freights if passenger rail helped to pay for concrete and steel bridges.
The line makes the most sense if it carries both commuter riders and medium-distance corridor trains. It's perfect for Baton Rouge-NOLA-Biloxi-Mobile, if the three states can ever get real about sharing the operating subsidy NOLA-Mobile. It would benefit, and contribute to, the coming daily
Sunset Shuttle to San Antonio. And as I've said before, it's the basic link for a train NOLA-Baton Rouge-Alexandria-Shreveport-Marshall-Dallas-Ft Worth.
Amtrak will start getting spare Horizon cars in about two years, when the new bi-levels displace them in the Midwest. They'll need some fixing up, but it should be much cheaper than buying new cars. This could be the best opportunity in a long time to get trains moving around NOLA.
The plan should be to start with a certain level of service, spend more money to add more frequencies and faster times, rinse, repeat, spend more money to add more frequencies and faster times, rinse, repeat, spend more money to add more frequencies and faster times, rinse, repeat …
Lay out the 10-year program, put in, say, $50 million a year, less than what Virginia is investing in passenger rail each year, and see what half a billion can get over 10 years: quite a lot.