Official Site, Regional Planning Commision
Here is the site to the Regional Planning Commission for Orleans, Jefferson, Plaquemines, St. Bernard, and St. Tammany Parishes. There are a few official studies that you can download such as Metairie CBD Land Use, Proposed Bike and Pedestrian Plans, Transportation, West End Redevelopment, a study done in 2004 on the region, among many others.
http://www.norpc.org/index.html