The Georgetown South railway expansion project was initiated in 2009 with Metrolinx now as its proponent. The project represented a significant increase in railway capacity, with the former one- to two-track railway being widened to 4 tracks within Toronto, with a total of 8 tracks where the Milton line and Barrie line share the corridor. All level crossings along the corridor were eliminated with using railway or roadway underpasses. The plan would allow for an increased frequency of trains on the route, increasing service from approximately 50 per day to about 300. It drew criticism from Weston community groups, which opposed the increased use of diesel locomotive on the basis of air pollution. They preferred instead that the corridor be electrified. The group has also requested more stations along the route.