Consider that the rail transport for grain is not being properly delivered due to oil tank-age transport.
http://seattletimes.com/html/businesstechnology
/2024172633_columbiatrainsxml.html
http://www.startribune.com/politics/national/274954641.html
I won't consider it... because it is not the truth. Year on year rail traffic volume is up. Every classification is up... and the category with the highest increase, year on year... is grain.
Blaming crude by rail would be like having a traffic jam and blaming it on an increase in blue automobiles, when the reality is there were more red ones that have been put on the highway.
Railroad are beholden to their shareholders with the primary mission to be to maximize share value. That being said, they are making massive capital investment to increase capacity, increase velocity, and lower dwell.