Communter Rail between NOLA and Baton Rouge

Light rail, monorails, and true commuter routes with park and rides and reasonable prices are all great. (Portland and, DC both good examples.) My problem here is that the proposed train fron BR to NOLA is far from visionary and, as planned, would likely fail. From what I recall it is Amtrak speed, far slower than driving, more expensive than driving and unlikely to be used by many peopel who own cars to commute to work.