The ocean carriers say no major changes are planned until after the end of first quarter of 2015.
American Great Lakes Ports Association and Canadian Chamber of Marine Commerce said investments in the Seaway came from both the public and private sector.
Wallenius Wilhelmson is taking several steps to prepare for the new low-sulfur requirements.
A congressional watchdog agency said the Agency for International Development could do more to assist AGOA countries develop export strategies.
Arkansas-based intermodal carrier sees growth in all divisions, aided by lower fuel prices, but offset by increased costs in hiring and retaining drivers.
Railroad sees increased volumes in nearly all commodity groups.