The CTA also embarked on a $530 million project to rehabilitate and replace stations and infrastructure along the Brown Line. This project was completed in December 2009. Seven of the stations that were included in the project are shared with the Purple Line, along with the associated trackage and signals from north of the Belmont station to the Loop. Beginning April 2, 2007, operation on the Purple, Brown and Red Lines between Addison and Armitage was restricted to three tracks, down from the previous four, due to construction at the Fullerton and Belmont stations. Because of this, fewer trains operated to downtown during the rush period in order to prevent a bottleneck. Only every other train was sent to the Loop during rush periods; all other trains operated between Linden and Howard only. Full service has since been restored. In addition, the Purple Line Express routing was changed to the Outer Loop, rather than along the Inner Loop, in order to provide riders more options for accessing stations between Belmont and the Loop. This line was returned to the Inner Loop in Spring 2009.