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Southwest Airlines cancelled some flights Tuesday after Monday's riots over alleged police misconduct.
The port benefited in March from shippers avoiding congestion at West Coast ports.
Announced on the heels of a port driver labor strike, Eco Flow will use "free-flow" to move containers out of terminals to off-dock yards.
Port of Dammam terminal operator International Ports Services set a record for the first four months of 2015.
Rates were down again in April 2015 after falling 1.6% in March 2015, according to the latest Cass Intermodal Price Index.
Investment firm Avondale Partners expects truckload pricing to increase 4%-9% in 2015.