Manifests departing North Yard for the Greeley Sub frequently have to "double over" in the yard, meaning their train cannot fit on a single yard track, and instead is on two (or even more) tracks. The UP crew on the head end here is waiting at a red signal at CP DS900 (Broadway). The train must pull into the OS at Broadway in order to clear the needed yard switch at the back end. The problem is that a North Yard Switch Job is on the Belt Main, headed for Bypass 2, so the train here cannot go anywhere.
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