New weekend morning trips and daily late-night trips for riders on the Lakeshore West and East lines will begin on April 7.
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In total, there will be 52 new trips per week on the two lines.
The Union Pearson Express is also adding two new early-morning trips between Union Station and Pearson International Airport for a total of 14 new trips per week. The additional service will also begin on April 7.
The two trips will depart Union Station at 4:55 a.m. and 5:10 a.m.
Schedules for the Lakeshore East and Lakeshore West corridors will be available on the GO Transit website.