Only through proper troubleshooting and then solving the underlying problems can control loop performance be improved. Process design certainly plays a role in control loop performance, but experience ...

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 ...

CTA train map showing Red, Blue, Green, Brown, Pink, Orange lines. CHICAGO (WLS) -- Green, Orange, Brown, Purple and Pink Line trains have resumed normal service to the Loop after earlier switching ...

CHICAGO (WLS) -- Green, Orange, Brown, Purple and Pink Line trains have resumed normal service to the Loop after earlier switching problems. Loop-bound Brown and Purple line trains were holding at ...