(Eric Fischer / Flickr)

Four stations on the CTA Red and Blue lines will be closed this weekend, and shuttle bus service will replace train travel along a portion of the Green and Pink lines.

On the Red Line, the Granville, Thorndale and Bryn Mawr stations will be closed from 10 p.m. Friday until 4 a.m. Monday for the third consecutive weekend as part of the CTA’s Red and Purple Line Modernization project. A free shuttle bus will be available between the Loyola and Berwyn stops. These stations are also scheduled to be shut down next weekend.

On the Blue Line, the Chicago station is set to be closed from 10 p.m. Friday until 4 a.m. Monday as part of the Your New Blue upgrade plan. The CTA recommends using the Grand station, about half a mile away, as an alternative. Shuttle bus service between the two stations will be available.

On the CTA Green and Pink lines, train service will be suspended between the Clinton and Clark/Lake stations from 2 a.m. Saturday until 2 p.m. Sunday due to maintenance on the Lake Street Bridge, the CTA says. Shuttle bus service between Clinton and Clark/Lake will be available.

During that timeframe, Pink Line trains are set to operate between 54th/Cermak and Clinton only, while Green Line trains from Harlem/Lake will run until Clinton. Green Line trains from Ashland/63rd and Cottage Grove will run clockwise around the Loop on tracks usually used by the Orange Line.

Current and upcoming system alerts for CTA trains can be found here.