Service on the CTA Brown Line has resumed Thursday morning after track conditions led to service being suspended. A CTA spokesperson said the extreme temperatures led to a cracked rail near the ...

But speed restrictions can be found on every train line, also plaguing the Green Line, Brown Line and sections ... of the train system, the CTA slow zone maps show. One area that has slowed ...

Some CTA trains were stopped for over an hour ... No one was injured in the incident. Brown and Purple Line trains were moving again about 8:20 a.m. after the incident, Chicago police said.