Google "gaports awe1". Add in that the new Panamax ships have a larger capacity, meaning that it is going to 4 to 6 days longer than by rail to the east coast after dropping them off at Long Beach
a) take longer to load and unload
b) because toll through the canal is based on the capacity of the ships - meaning that ships might wait in port an extra day to catch more containers. to make the trip cost effective.
Supply chain is important. Just in time manufacturing requires the parts get there when they are needed.( I was trained in this field and developed some of the first computer software ).
I got in over a decade ago at $36 a share and hold Georgia Power Preferred . Right now it is overpriced - in fact I sold some off last week a) to buy an SUV and because I feel that the price like get back to $50. It rose this high because of BREXIT. I like the income that I am getting and will continue hold.
Railroads have a monopoly on moving large, bulky products, like coal, wood chips, iron ore, corn, wheat, ethanol. It is very easy for truckers to compete with one another, driving down profitability to below zero..
Boeing makes its planes in several plants. The semicompleted 737 fuselages travel by rail from Kansas to Washington state - try moving those over the road.
The time value cost of Get the book "Principles of Transportation Economics" by Kenneth Boyer.