CHICAGO (CBS) — The second phase of reconstruction of the Wells Street Bridge begins Friday night.

The project will mean major disruptions on the CTA’s Brown Line and Purple Line heading into downtown from 10 p.m. April 26 through early May 6.

READ MORE: City Was Warned About Thousands of Corroding Light Poles But Failed to Fix Many, CBS 2 Investigation Finds

During the week next week, the inbound Purple Line will be suspended past Howard Street Station. For Brown Line users riding on the North Side during peak hours, one of every three inbound trains will end at the Merchandise Mart. Two of three will switch over to Red Line tracks after Fullerton and make Red Line stops, but only until Roosevelt.

READ MORE: Chicago Weather: Rain Arrives Sunday

Weekend rerouting will also affect the Green, Orange and Pink Lines, due to work to replace tracks at the ‘L’ junction at Lake and Wells, and along the ‘L’ track curves at Hubbard and Kinzie.

MORE NEWS: View Live Radar

For details on the service disruptions and alternate transportation options, click here.