Thirteen ships are at anchor in San Pedro Harbor including eight containerships.
Liner carriers in the transpacific say they will begin to impose a $1,000-per-FEU surcharge on Monday.
The Obama administration is monitoring the contract negotiations, while shippers groups are asking for presidential intervention.
Ports, airports and railways ready to implement winter contingency plans.
Belgian port reports record growth thanks to container and liquid bulk sectors.
Railway and intermodal provider set records for revenues and earnings in 2014.