An inbound Pink Line train flies past Tower 18 as it enters the Loop. Taken shortly after sunset, Tower 18 is a busy place during evening rush.

A Purple Line Express rushes north out of the loop. The Purple Line only visits the Loop during rush hours only. During the off peak hours the line operates between Howard on Chicago's northern ci... (more)

Night running in the Loop.

The golden hour paints this loop bound brown line train as it snaked around the curve toward Merchandise Mart.

Always love this view. Two trains meets along the tight curve. Control Tower 18 visible.

"Lake Street" train enters the NW corner of the Loop Elevated at tower 18

Green line train runs south from the loop.

5pm on an expectedly cold February evening. Red line trains run almost back-to-back heading downtown.

Green line train toward the loop

A northbound CTA Red Line train departs out of the Addison station, passing through Wrigleyville.

CTA 5529 arrives into the Addison station with another trainload of excited Cubs fans ready to celebrate the team's first World Series win since 1908.

Two trains meet under the watchful gaze of the Trump building

The weather in August is usually hot, and the weather that morning in Chicago was pretty bad, but the action at Tower 18 was just as hot. Constant commuter traffic easily viewed by the parking gar... (more)

Chicago's Tower 18 Junction at the corner of Lake and Wells was long billed as the world's busiest junction, and while I certainly can't vouch for that claim's accuracy, I can definitely tell you ... (more)

A Green Line Train bound for Ashland/63rd, approaches State/Lake station. It's previous stop Clark/Lake can be seen in the distance. Take from the Wit Hotel.