PMA says it is not close to a new contract with the ILWU.
ILWU says it may take between eight to 10 days to unload a ship because of limits on longshore hiring.
Business groups tell Obama that the use of a mediator is imperative in longshore union talks.
DHL pilot with its customer Ricoh showed augmented reality technology increased efficiency in picking process, with uses in transportation and last mile delivery also possible.
Strong container and steel volumes led the way for a record year at the port.
Turnover rate among large U.S. truckload carriers increased 1 percent to an annualized rate of 97 percent in the third quarter of 2014.