CSX Transportation has work completed or construction underway at one-third of the clearance projects along the double-stack freight rail corridor between Mid Atlantic seaports and the Midwest.

The improvement projects will increase vertical clearances at 61 locations on CSX rail lines in the region to accommodate intermodal trains carrying double-stacked containers. To date, work is complete at five of the locations, and crews are working at 15 others. The progress to date means almost one third of the clearance projects are completed or underway for the National Gateway's phase one, which spans an existing rail corridor between North Baltimore, Ohio and Chambersburg, Pa.

CSX has said it will invest an additional $160 million to complete the National Gateway. The investment brings CSX's planned private investment in the critical infrastructure project to about $575 million over several years.

CSX is targeting a 2015 completion date for the project to coincide with the expansion of the Panama Canal, which is expected to bring more traffic through East Coast ports.

To learn more about the National Gateway, visit www.nationalgateway.org.