The Bombardier AC5000 test train has just finished a one mile run at top speed of 55 MPH between Pulaski and Kedzie stations and brakes for a station stop. This is the Lake Street branch of the ... (more)

Now that the Bombardier AC5000 test cars are assigned to the Green line for four weeks of testing, the new assignment brings the test train to the tracks pof Chicago's famed Loop "L". Running nor... (more)

A WB Pink line train winds around the Wabash-Lake corner of the famed Chicago Loop "L", but since this curve is offset, it is not the sharpest on the Loop.

The Bombardier AC5000 test train is now in its third week of revenue testing, still on the Red line, with one more week after this one to go. Then the train will transfer to the Green line. Northb... (more)

The Bombardier AC5000 test train has moved from the Red line to the Green line for its second set of four weeks of inservice revenue testing. This means running over the famed Loop elevated and th... (more)

It's easy to see why IIT students might call this soundproofing structure, The Tube. The AC5000 test train roars NB out of the tube. The elevated structure here is the city's first "L", dating bac... (more)

A CTA orange line train flys over Tom Ping park's stylish pagoda on its way to Midway airport. The Chicago River is in the foreground. My 200th picture!

The logos are back...only two of 12 prototype Bombardier AC5000 have them but evidently an effort is being made to keep them on the point. This SB Red line test train passes another in the opposi... (more)

Tower 18. One of the busiest junctions in the world.

The Loop is distinctively Chicago "L", although the name probably predates the "L" and goes back to the cable car loops downtown. A Pink line train brakes for Adams station on the Wabash side of ... (more)

No longer spanking brand new, the eight car prototype test train of CTA Bombardier AC5000s leans into the sweeping curve just south of the 63rd ST Red Line station with the 103 year old Englewood ... (more)

While the Loop is distinctively Chicago "L", so are the two dozen grade crossings on the "L". No other heavy rail transit system has them. Here a SB Brown Line train dashes out from behind adjacen... (more)

A NB Red Line train glides around brand new trackwork while entering the Sheridan RD station on the 4 track north side main. The two inside tracks provide local service at this station. Trains o... (more)

A NB Brown Line train leaves the skyscrapers of the business district behind as it proceedes over the south leg of the Loop elevated over Van Buren ST. The centered building, long the city's talle... (more)

A Red Line train slows to a stop at Sheridan Road, a station sandwiched in between two 90 degree turns that date back to pre 1900 when this elevated was constructed. The right of way was shifting ... (more)