Proposed as a modeling element includes the interchange with NS and CSX at the Gentilly Yard and Wye in New Orleans East, with an interchange diamond/why connecting CSX and KCS in Gulfport, MS, along with the proposed modeling elements:

Wye and Diamond north of NS Auto Yard
Tracks through swamps in New Orleans East
Bridge at Chef Menteur Pass
Tracks through swamps
Bridge at Riggolets Pass
Coastal tracks through Mississippi
Bridge over Pearl River
Tracks to Waveland
Bridge over Bay St Louis
Tracks to Gulf Port
Wye and Diamond with KCS