He's wrong.
Gretna is across the Mississippi River (on the west bank of the river) from New Orleans (on the east bank of the river) via the Crescent City Connection Bridge, aka GNO Bridge #2, put into service 1988. The highway over the bridge between the two cities is the Westbank Expressway.
Due to I-10 and I-12 being flooded, it was impossible to get out of the city on the east bank -- people downtown had to travel to the west bank via the Crescent City Connection to get out.
People uptown went out over the Huey P. Long Bridge, aka GNO Bridge #1.
All the news people and most of the rescuers were coming in from the west bank over those two bridges.
I know people who got out of New Orleans over these bridges, but they're white. Which might something to do with it.
I was leaning in that direction as well. Any student of military strategy knows that bridges are, by definition, "funnels." To suggest that one is not an evacuation route beggars belief. I was simply curious if this bridge was a "bridge to nowhere," so to speak.
"I know people who got out of New Orleans over these bridges, but they're white."
They didn't get out of N.O. via this bridge on foot, which these people were. The people in this story were on high and dry ground, there was no reason for them to be allowed to cross the bridge