Outbound Metra commuter train departing downtown Chicago at North Halstead Street on September 14, 2011.
Inbound Metra commuter train as seen from North Halstead Street in downtown Chicago on September 14, 2011.
Former Pennsylvania Railroad position-light signal bridge at Racine Avenue in Chicago at sunset on September 14, 2011.
Outbound Metra commuter train departing Chicago at Racine Avenue at dusk on September 14, 2011.
Inbound Metra Electric commuter train stopping at University Park in Chicago at dusk on September 14, 2011.
Inbound Metra commuter train arriving at Chicago Union Station at dawn on September 15, 2011.
Outbound Metra Electric commuter train in Chicago on September 15, 2011.
Inbound Metra commuter train coming into Chicago Union Station at North Halstead Street at sunset on September 15, 2011.
Inbound Metra commuter train approaching Chicago Union Station at Racine Avenue just after sunset on September 15, 2011.
Detail of rear truck on BC Rail no. 4644 at Canadian National's Markham Yard in Homewood, Illinois, on November 5, 2011.
Amtrak passenger train no. 51, the westbound "Cardinal," approaching Thornton Crossing in South Holland, Illinois, on November 5, 2011. The crew had to stop the train and manually line the crossovers.
Thorton Crossing in South Holland, Illinois. View is looking east on the Canadian National (left) and south on the Union Pacific. November 5, 2011.
Pigeons resting at CSX's Barr Yard in Riverdale, Illinois, on November 5, 2011. View is looking west from the Halstead Avenue overpass.
Indiana Harbor Belt SW1500 diesel locomotives in the IHB's Blue Island yard in Riverdale, Illinois, on November 5, 2011.
Pigeons circle above the Indiana Harbor Belt's Blue Island Yard in Riverdale, Illinois, on November 5, 2011. The view is looking east off the Halstead Avenue overpass.
CSX westbound autorack train arriving in the Indiana Harbor Belt's Blue Island Yard in Riverdale, Illinois, on November 5, 2011. The view is looking east off the Halstead Avenue overpass.
Iowa Interstate train CBBI--with a single GE wide cab running long-hood forward--on the Metra Rock Island District crossing over the CSX and Indiana Harbor Belt lines at Blue Island, Illinois, on November 5, 2011.
Indiana Harbor Belt northbound freight train approaching the crossing in Blue Island, Illinois, on November 5, 2011.
Eastbound Union Pacific grain train approaching Glen Ellyn, Illinois, at twilight on November 5, 2011.
Passengers disembarking from an outbound Metra UP West Line train as it pulls out of Glen Ellyn, Illinois, at dusk on November 5, 2011.
BNSF eastbound freight train passing the Highsland Station in Hinsdale, Illinois, on November 6, 2011. The CB&Q signal bridge is just days from replacement; the new signals are waiting to be cut-in behind it.
BNSF westbound empty coal train approaching the Highlands Station in Hinsdale, Illinois, on November 6, 2011.
Amtrak westbound passenger train no. 381, "Carl Sandberg," passing the Highlands Station in Hinsdale, Illinois, on November 6, 2011. The CB&Q signal bridge is just days from replacement.
Belt Railway of Chicago switcher heading into the bowl at the BRC's Clearing Yard in Bedford Park, Illinois, on November 6, 2011. The tower for the yard's double hump is visible in the distance, where two six-axles have about finished shoving a cut of cars over the hump.
Ash Street crossing in Chicago, Illinois, on November 6, 2011. The views are down the Canadian National (ex-IC) to the right and down Norfolk Southern (ex-CJ) and CSX (ex-B&OCT) to the left.
Canadian National eastbound freight train M338 from Iowa passing downtown Chicago on November 6, 2011.
16th Street crossing just south of downtown Chicago on November 6, 2011. In the foreground, Canadian National's ex-IC line crosses a connecting track between the Metra Rock Island line at right and the St. Charles Air Line to the left.
Amtrak passenger train no. 4, the eastbound Southwest Chief, arriving into Chicago Union Station with an FRA inspection car on the rear on November 6, 2011.
Amtrak passenger train no. 364, the eastbound "Blue Water" for Port Huron, Michigan, departing Chicago on November 6, 2011.
A lone passenger walks through the empty Great Hall of Chicago Union Station at dusk on November 6, 2011.
Chicago South Shore & South Bend westbound commuter train no. 110 stopping at Chicago's Van Buren Street station during the morning rush on December 8, 2011.
Metra Electric line commuter trains passing just south of Van Buren Street Station during the morning rush on December 8, 2011.
Framed by the East and West Congress Parkway overpasses, a Metra Electric commuter train parks on a siding at Van Buren Street station after its inbound morning rush hour trip on December 8, 2011.
Morning commuters exit Metra's Van Buren Street Statoin as their inbound train departs on December 8, 2011.
There's a Santa and snowflakes in the window of the Rondout tower as twilight falls on December 8, 2011 and inbound Metra Milwaukee North Line train no. 2146 heads for Chicago.
There's a Santa and snowflakes in the window of the Rondout tower as twilight falls on December 8, 2011 and outbound Metra Milwaukee North Line train no. 2125 approaches from the south.
Eastbound BNSF Railway unit crude oil train passing the depot in Western Springs, Illinois.
Two L trains meet at Tower 12 in the southeast corner of the Loop in downtown Chicago.
Two Chicago L trains passing at Tower 12 in the southeast corner of the Loop.
Chicago L train approaching Tower 12 at the southeast corner of the Loop.
Two Chicago L trains meeting at Tower 12 in the southeast corner of the Loop.
Two Chicago L trains meeting at Tower 12 in the southeast corner of the Loop.
Two Chicago L trains passing at Adams station in the Loop.
Two Chicago L trains passing at Adams station in the Loop.
Passengers disembarking from a Chicago L train at Adams station in the Loop.
Passing through Clark station on the Chicago L.
View out the rear of an outbound Chicago L train near Armitage station.
Inbound Chicago L train departing Armitage station.
Outbound Chicago L train approaching Armitage station.
Inbound Chicago L train departing Armitage station.
Passing Tower 18, at the northwest corner of the Loop, in a Chicago L train.
Chicago L trains passing on the Loop.
Rolling through Tower 12 at the southeast corner of the Loop on the Chicago L.
Three L trains converge at Tower 18 in the northwest corner of Chicago's Loop.
Two Chicago L trains passing at Tower 18 in the northwest corner of the Loop.
At Tower 18 on the Chicago L, in the northwest corner of the Loop, an outbound Brown Line train heads north while an inbound Pink Line train waits in the distance.
An outbound Green Line train streaks through Tower 18 on the northwest corner of Chicago's Loop.
Inbound Brown Line train passing Tower 18 at the northwest corner of Chicago's Loop.
Chicago L trains passing at Tower 18 in the northwest corner of the Loop.
Outbound Brown Line train turning north at Tower 18 in Chicago's Loop.
Brown Line train crossing the Chicago River amidst heavy construction work on the riverfront.
Chicago Water Taxi passing under the Franklin Street Bridge on the Chicago River.
Chicago Water Taxi and Brown Line train at the Wells bridge over the Chicago River.
Siteseeing boat and Pink LIne train at Lake Street on the Chicago River.
Brown Line train crossing the Chicago River on the Wells Street Bridge.
Pink Line train at Franklin Street approaching the northwest corner of Chicago's Loop.
Green Line train arcing near the northwest corner of the Chicago Loop at Lake and Franklin Street.
Great Hall of Chicago Union Station