Here is a view of the old Tower 18 on Chicago’s Loop “L”, when this was the world’s busiest railroad crossing. The old Loop ran both tracks in only one direction, but this changed in 1969, when the CTA wanted to connect the Lake Street “L” with the new Dan Ryan line. Therefore, the old tower had to go, as it was situated right where the new tracks had to go.

Here is a view of the old Tower 18 on Chicago’s Loop “L”, when this was the world’s busiest railroad crossing. The old Loop ran both tracks in only one direction, but this changed in 1969, when the CTA wanted to connect the Lake Street “L” with the new Dan Ryan line. Therefore, the old tower had to go, as it was situated right where the new tracks had to go.