CHICAGO (CBS) --If you were late to work Tuesday morning because of CTA train delays, you were not alone. Switching issues on elevated trains in the Loop delayed thousands of morning commutes.

The Tribune called it the worst crash in Chicago Transit Authority history. Eleven people were killed and scores injured when a CTA elevated train struck the rear of a standing train at Lake ...

In the 1920s, workers in major US cities commuted via buses, subways, ferries, streetcars, and automobiles.

Chicago's eastern boundary is formed by ... the Loop refers to a group of high-rise buildings within a rectangular loop of elevated train tracks, hence its name. As the city's central business ...

The stabbing happened about 10 minutes after a woman was shot and killed at the Red Line stop at 69th Street on the South ...

Trains on multiple CTA lines bypassed a station in the Loop after a man was stabbed Monday night. According to Chicago police, a 30-year-old man was stabbed Monday in the 100 block of North Clark ...

Although most L train stops are elevated as the system's ... The system's 11 lines extend outward from the Loop, making stops in North, East and South Chicago before heading on to nearby ...

Smoking brakes from a CTA train prompted an emergency response on Friday morning in Chicago's West Loop neighborhood. According to the Chicago Fire Department, firefighters responded to a CTA stop ...

The stabbing happened at about 9:57 p.m. on the train near CTA's Red Line Monroe Station on State Street, according to police. A man, 30, was stabbed in the abdomen by an unknown man. He was taken ...