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.

Living beneath elevated train tracks sounds like a nightmare for anyone wanting a little peace and quiet and a good night's sleep. But that's daily life for dwellers in a cluster of box-shaped ...

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.