Business groups tell Obama that the use of a mediator is imperative in longshore union talks.
The ocean carriers say no major changes are planned until after the end of first quarter of 2015.
No rapid conclusion is expected in labor contract talks that have been ongoing for six months.
Employers "hopeful that this will allow us to move toward conclusion of an agreement in the near term."
Ports, airports and railways ready to implement winter contingency plans.
BlueWater Reporting shows 15 of 25 services have some sort of schedule disruption to Oakland, reflecting how delays in Los Angeles and Long Beach have impacted carrier schedules.