The USCG has issued a VTS measure as follows:
 
Date:  September 10, 2018 through September 217, 2018
Time:   24 hours/day
Location: MM 156.0 to MM 158.0 Above Head of Passes
Reason:   Construction/Roll Off Operations.
Measure: All deep draft vessels and large tows are restricted to one-way traffic


The full sib is below.

Waterway Status – VTS Measure MM 156 – 158 AHP LMR

Vessel Traffic Service Lower Mississippi River, in accordance with the Navigation Safety Regulations, Code of Federal Regulations Title 33, Subpart 161.11, will establish a Vessel Traffic Service (VTS) Measure for the waters of the Lower Mississippi River from Mile Marker (MM) 156 Above Head of Passes (AHP) to MM 158 AHP. This Measure is needed to protect persons and vessels from the potential safety hazards associated with construction/roll-off operations at MM 157.2 AHP, RDB. This Measure is in effect with the following provisions:

September 10, 2018 through September 17, 2018: All deep draft vessels and large tows are restricted to one-way traffic from MM 156.0 to MM 158.0 Above Head of Passes 24 hours per day.
Updates and/or changes to the published schedule will be broadcast via Safety Broadcast Notice to Mariners.

For additional information or for any passing arrangements, vessels may contact the tug vessel TIM LANDRY via VHF-FM Channels 12 and 67 during the operation. Mariners are urged to transit at slowest safe speed to minimize wake and proceed with caution.

For further information, contact:
 
Coast Guard Sector New Orleans Command Center: (504) 365-2200
Coast Guard Waterways Management: (504) 365-2280
Vessel Traffic Service Lower Mississippi River: (504) 365-2230, VHF FM Ch. 12, 67