
Amtrak’s outbound Capitol Limited is less than 10 minutes out of Chicago Union Station and has just crossed Lumber Street at the southern end of shop and service complex. If you look carefully you will see a P42DC siting on a service track awaiting servicing or its next assignment.
This is still Amtrak-owned trackage although in a few minutes No. 30 will be on the Chicago Line of Norfolk Southern, which it will use all the way to Cleveland.
On Amtrak these signals are known as CP Lumber and are a familiar sight to Amtrak locomotive engineers piloting trains from the East, Michigan and St. Louis on their final few miles into Chicago.
Seeing them means their shift is about over and their train is about reached its terminus.
Not every Amtrak train coming into Chicago sees these signals. Trains coming in from the BNSF Raceway from Aurora don’t go past here nor on most days do trains coming off the route from New Orleans and Carbondale, Illinois. And of course trains coming down from Milwaukee use the north concourse at Union Station and don’t see these signals either.
They are, of course, one set of dozens of signals that Amtrak trains pass along their respective routes. But most of those signals don’t offer a city skyline view as these do.