Railroad freight traffic could be shifted of tracks that run through one of Louisiana's most affluent neighborhoods if planners get their way.

But it could take $700 million to make the shift.

State transportation officials are studying whether to reroute freight trains from a track that bisects one of the most affluent parts of Metairie to a combination of tracks that would parallel Earhart Expressway and pass through the Hollygrove neighborhood on New Orleans' western edge.