It takes 72 hours to fully evacuate GNO. Clearly we don't have that kind of time. There aren't many ways out the whole area - much less the city. There's I-10 to the east. You could catch that to the I-59 and head north (Hattiesburg) or continue east to I-65 in Mobile and head north. You can take the I-10 west to the I-55 (Hammond) and head north there. You could go further west to Lafayette and take the I-49 north there. You can go north on the Causeway and then go either east or west. There are some rural roads, but it's pretty limited.

I gotta go take care of some stuff. L8R,

Steve