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.

Red Line trains were rerouted to the elevated lines between Fullerton and Cermak-Chinatown, the CTA said just after 3 p.m. SEE MORE: Latest traffic in Chicago The CTA said later Tuesday afternoon ...

Labor leaders and lawmakers must address underfunding and keep buses and trains running on time, a UIC urban planning expert writes.

The best way to get around Chicago is via public transportation – specifically the L train. Operated by the Chicago Transit Authority, the L (short for "elevated train") is cheap and easy to use.