7:15 a.m. — Widespread Code Red and Purple air quality, worst in years Residents in the Washington and Baltimore regions are awakening to their worst air quality in years.

Red and Purple lines won’t run between Belmont and Addison Oct. 27-30 and Nov. 10-13. The Red and Purple Line Modernization project is now two-thirds complete, the CTA said.

The disruption began around 6:30 a.m., and as of mid-afternoon, CTA officials still had not said what caused the power outage that halted Brown, Red, and Purple Line service near Belmont.

Red, Purple Line Upgrades May Mean Cutting Stops January 25, 2011 / 10:25 AM CST / CBS Chicago Updated 01/25/11 - 5:01 p.m.

CTA Red, Purple and Brown line service will be disrupted on some upcoming weekends this fall, as the next stage of a major reconstruction of North Side tracks and stations begins.