[SauronOfMordor]

For a bus convoy, you could go across the bridge, then head west on secondary roads, and finally make it out of the area.

On foot, the only destination would be to squat in Gretna

[Figment]

"For a bus convoy, you could go across the bridge, then head west on secondary roads"

What secondary roads would that be? You have the West Bank Expressway to the Huey P. Long Bridge, back over to I-10. Did I mention the Harvey Tunnel on the West Bank Expressway?