X505/X504 now traverse the CN Chicago Division entering the states via the Sarnia-Pt Huron Tunnel. Shown here on the Flint sub west of Tappan Yard it has just come under the river on Feb 4, 2001 at 11:45a.

This allows Double Stacked containers which are too tall for the Detroit tunnel. Only Detroit terminated Double Stacks are seen on the CSX lines.

Photo Copyright Jerry Sundin 2001