31 Guelph - Georgetown - Union
16 Hamilton QEW Express
21 Milton - Union

From 7 p.m. on Friday, July 17 until 5 a.m. on Monday, July 20, eastbound buses operate along their regular route.

Westbound buses start their trips at the Union Station GO Bus Terminal, then proceed:

northward along Yonge Street;
westward along Front Street West; and then
southward along Bay Street to Lake Shore Boulevard West,
resuming their regular route westward along Lake Shore West.

90C Newcastle - Union

At 6:20 a.m. on Sunday, July 19, a bus starts its trip at the Union Station GO Bus Terminal, then proceeds:

northward along Yonge Street;
westward along Front Street West;
southward along Lower Spadina Avenue; and then
eastward along Lake Shore Boulevard West to the Rees Street ramp onto the Frederick G. Gardiner Expressway,
resuming its regular route eastward along the Gardiner.

65 Newmarket - Union

From 7 p.m. on Friday, July 17 until 5 a.m. on Monday, July 20, southbound buses operate along their regular routes to the Yonge Street ramp from the Frederick G. Gardiner Expressway, then detour:

westward along the Gardiner, exiting at the Spadina Avenue ramp;
northward along Lower Spadina Avenue;
eastward along Bremner Boulevard;
southward along York Street;
eastward along Harbour Street;
northward along Bay Street; and then
eastward into the Union Station GO Bus Terminal.

Northbound buses start their trips at the Union Station GO Bus Terminal, then proceed:

northward along Yonge Street;
westward along Front Street West;
southward along Lower Spadina Avenue; and then
eastward along Lake Shore Boulevard West to the Rees Street ramp onto the Frederick G. Gardiner Expressway,
resuming their regular route eastward along the Gardiner.

90B Oshawa - Union

At 4:40 and 5:40 a.m. on Saturday, July 18 and Sunday, July 19, westbound buses leave the Oshawa GO Station and operate along their regular routes to the Yonge Street ramp from the Frederick G. Gardiner Expressway, then detour:

westward along the Gardiner, exiting at the Spadina Avenue ramp;
northward along Lower Spadina Avenue;
eastward along Bremner Boulevard;
southward along York Street;
eastward along Harbour Street;
northward along Bay Street; and then
eastward into the Union Station GO Bus Terminal.

At 1:20 a.m. on Saturday, July 18, Sunday, July 19 and Monday, July 20, eastbound buses starts their trips at the Union Station GO Bus Terminal, then proceed:

northward along Yonge Street;
westward along Front Street West;
southward along Lower Spadina Avenue; and then
eastward along Lake Shore Boulevard West to the Rees Street ramp onto the Frederick G. Gardiner Expressway,
resuming their regular route eastward along the Gardiner.

61 Richmond Hill - Union
71 Stouffville - Union

From 7 p.m. on Friday, July 17 until 5 a.m. on Monday, July 20, southbound buses operate along their regular routes to the Yonge Street ramp from the Frederick G. Gardiner Expressway, then detour:

westward along the Gardiner, exiting at the Spadina Avenue ramp;
northward along Lower Spadina Avenue;
eastward along Bremner Boulevard;
southward along York Street;
eastward along Harbour Street;
northward along Bay Street; and then
eastward into the Union Station GO Bus Terminal.

Northbound buses start their trips at the Union Station GO Bus Terminal, then proceed:

northward along Yonge Street;
westward along Front Street West;
southward along Lower Spadina Avenue; and then
eastward along Lake Shore Boulevard West to the Rees Street ramp onto the Frederick G. Gardiner Expressway,
resuming their regulars route eastward along the Gardiner.

18C Union - Hamilton late-night

At 1:30 a.m. on Saturday, July 18, Sunday, July 19 and Monday, July 20, buses start their trips at the Union Station GO Bus Terminal, then proceed:

northward along Yonge Street;
westward along Front Street West; and then
southward along Bay Street to Lake Shore Boulevard West,
resuming their regular route westward along Lake Shore West.