Short-sea shipping could solve the US traffic problem

Portworld: The US-based Institute for Global Maritime Studies has written a report entitled How Coastal Shipping Could Reduce Traffic Congestion, Lower Pollution, and Bolster National Security. It explores the potential for coastal shipping as part of the United States' transportation network.
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"An inland barge enjoys 576 tonne-miles to the gallon, compared to 155 on a truck and 413 on a train. From a greenhouse gas emissions perspective, many US coastal shipping operations offer substantial savings," the report said.

Read about the 'Revolutionary' short-sea shipping report