LOGAN SQUARE — Service between the Jefferson Park and Harlem Blue Line stops will be suspended this weekend as the CTA begins making improvements to the tracks, the next phase of its multimillion dollar “Your New Blue” project.

The suspension will last from 10 p.m. Friday until 4 a.m. Monday, according to the CTA.

Riders will be able to take free shuttle buses between the Jefferson Park and Harlem stops during the closure.

The work is part of the CTA’s $492 million “Your New Blue” project, which is bringing major track and station upgrades to stations all along the north branch of the Blue Line.

The last time the north branch received track and signal upgrades was in the early 1980s when the Blue Line was extended by eight miles, from Jefferson Park to O’Hare, according to CTA officials.

This weekend’s closure is only the beginning of the project, which is expected to last through November. A total of seven service suspensions are expected, with most of them only affecting weekend service.

Blue Line trains along the O’Hare branch have gotten a lot more crowded during morning rush hour in recent years. That’s because the neighborhoods surrounding the stations are attracting people who take the train more.