and Kitchener rail lines, as well as the Union Pearson Express. In 2021, Metrolinx announced a pilot service to London, Ontario, with one train towards Toronto in the morning and one train returning to London in the evening. At this time, the Presto card cannot be used for such trips and riders must pre-purchase digital tickets in advance. Improvements are being made to Union Station, which is the busiest passenger transportation facility in Canada, and is expected to have its current passenger traffic double in the next 10 to 15 years. Improvements underway include a new roof and glass atrium covering the platforms and railway tracks, new passenger concourses, additional staircases and vertical access points and general visual improvements to the station. Other longer term options such as a second downtown station and/or connections to a future Relief Subway Line are also being studied to meet future demand. GO Transit is currently undergoing a major expansion project to improve train service. The project will electrify the Lakeshore East, Lakeshore West, Barrie, Kitchener and the Stouffville lines, and increase train frequency on various lines to 15 minutes or better on these corridors, with several new stations being built both within Toronto and throughout the GTHA. It will also bring all-day, two-way service to the inner portions of the Barrie, Kitchener and Stouffville lines. GO Transit will increase the number of train trips per week from 1,500 (as of 2015) to about 2,200 by 2020 and expand to 10,500 weekly trips upon completion. Most of the extra trips will be in off-peak hours and on weekends. The expanded services, new infrastructure and electrification is projected to roll out in phases between 2025 and 2030. The 10-year regional express rail plan will cost $13.5 billion and will require of new track, including new bridges and tunnels. Service Service area GO Transit primarily serves the Greater Toronto and Hamilton Area–the cities of Toronto and Hamilton and the surrounding regions of Halton, Peel, York and Durham. GO Transit's lines extend into the nearby Niagara and Waterloo Regions, the cities of Brantford and Peterborough, and Simcoe, Dufferin and Wellington counties—an area largely coextensive with the Greater Golden Horseshoe. Under the provincial charter, GO Transit is permitted to serve cities elsewhere in Ontario, but has no plans of doing so. In total, GO trains and buses serve a population of 7million in an area radiating in places