Because of
manufacturing practices in Asia, there is a clear bias toward east-bound weekend
sailings, which means that vessels are more likely to arrive at the West Coast
of the United States on Thursdays and Fridays and Saturdays. Because of this
bunching, the port complex has traditionally been strained during peak periods,
and under-used during slow periods.
The advent of mega-ships carrying 8,000 TEUs may have obscured this basic
pattern to some degree--because it takes more days to unload a large ship--but
the fact remains that there is still a bias toward weekend sailings and late
week arrivals.
Changing business practices to spread out arrivals in such a way as to make
better use of existing terminal, rail and truck capacity should be an issue
that shippers and carriers begin to explore. New vessel sailing schedules
would require shippers to make changes in their production schedules, but
the results could be significant in faster transit times.