The E-Train Corridor This World Trade Center subway entrance area retains the same design and appearance of this space as it existed prior to the 9/11 attacks. Many of the materials in this area, including the travertine floor, signage, doors, and other fixtures, have been preserved from the original World Trade Center complex. We installed a decal that captures a timeline of World Trade Center history, recognizing significant events in the past and events looking toward the future.