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Harley Shaiken, a professor at the University of California, Berkeley, said an agreement between the ILWU and PMA could be reached in days rather than weeks.
Move comes as ILWU, PMA talks enter 10th month.
Union representing engineers, conductors agrees to arbitration.
On-time performance is being hampered by congestion at West Coast ports.
DHS funding crisis means the agency will have to focus resources on border security, cargo clearance
The revised agreement would allow collaboration on congestion, transportation infrastructure needs and pollution mitigation.