The problem, which began in late summer, initially stemmed from a shortage of truck drivers and the chassis that they use to haul containers to and from the Los Angeles shipping terminals. As peak season has begun, there are not enough chassis to handle the peak season container volume. Those shortages had occurred as U.S. import container volume was surging (up 6% year-over-year from January-October at the So Cal Ports). Also, the increase of massive container ships that are deluging the docks with cargo have been pushing the limits of the terminals’ capacity to work ships in a reasonable time. Increased safety inspections in Southern California have also increased average truck turn times to two to three hours at terminal gates and yards. Combine these with rail- and drayage-related delays and the growing tension between U.S. West Coast dockworkers and their employers and we have a perfect storm that has resulted in the worst congestion in more than a decade.