
Metrolinx is building the Ontario Line subway between Exhibition Place / Ontario Place and the area near the former Ontario Science Centre, through downtown Toronto.
From late Friday, March 21 until the end of service Sunday, March 23, GO Transit is cancelling train service along the 09 Lakeshore East line between Pickering GO Station and Union Station. It cancelling train service along this section of the line to accommodate construction of the new subway near the future Riverside / Leslieville Station. This construction also affects service along the 71 Stouffville line this weekend.
Shuttle buses replace trains along the line Saturday and Sunday, but will not drop off or pick up passengers in Rouge Hill, Guildwood, Eglinton, Scarborough, or Danforth GO stations. Instead, board the TTC to travel to and from those stations.

GO is adjusting schedules and connection times this weekend. Replacement GO buses may leave stations at different times than the usual train times. Check schedules and leave earlier than usually to make sure you can board your bus or train at the correct time. GO is also adjusting the schedules for buses along the 88 Peterborough / Oshawa route to make sure passengers can connect with trains.
Depending on your destination, you may wish to use other GO services, including buses along the 92 Oshawa / Yorkdale, 94 Pickering / Mississauga, or 96 Oshawa / Finch express routes to connect with local transit and continue your commute.
Friday, March 21
Eastbound
- GO is cancelling the trains that usually start their trips in Union Station at 11:50 p.m. and 12:20 and 12:53 a.m.
- Instead, GO buses along the 90B branch of the 90 Lakeshore East route replace the trains. They start their trips in Union Station Bus Terminal and operate express — without stopping — to Pickering GO Station. The buses then drop off or pick up passengers in Ajax, Whitby, and Durham College Oshawa GO stations.
Westbound
- GO is cancelling the trains that usually start their trips in Pickering at 11:10 and 11:39 p.m. Buses along branch 90B replace the trains.
- Instead, GO buses along the 90B branch of the 90 Lakeshore East route replace the trains. They start in Oshawa, then serve passengers in Whitby, Ajax, and Pickering. They then operate express to Union Station terminal.
Saturday, March 22
Sunday, March 23
- Buses replace trains west of Pickering all day. Trains continue to operate between Oshawa and Pickering every 30 minutes.
- Late-night / early-morning buses continue to operate along the 90B branch of the 90 Lakeshore East route with regular schedules.
- Replacement buses operate along the 90E branch of the 90 Lakeshore East route. Buses along branch 90E branch operate express between Pickering and Union Station terminal.
Buses along the 88 Peterborough / Oshawa route
Friday, March 21
Northbound
- Passengers aboard train-replacement buses arriving in Oshawa at 12:55 and 1 a.m. have to wait nine or four minutes to connect with the 1:04 a.m. Route 88 bus (one minute more or four minutes less than usually).
Southbound
- Passengers arriving in Oshawa at 11:24 p.m. have to wait 21 minutes to connect with a train-replacement bus leaving at 11:45 pm. (six minutes more than usually).
Saturday, March 22 and Sunday, March 23
Northbound
- Passengers arriving in Oshawa have to wait 26 or 28 minutes to connect with Route 88 buses (16 or 18 minutes more than usually). And, passengers travelling from Union have to arrive as much as 30 minutes earlier than the usual train time to connect with the route 88 bus in Oshawa. They also have an extra transfer from bus to train in Pickering.
While the line is closed to trains, Metrolinx contractors are relocating the tracks in the rail corridor. They’re shifting the tracks from the east to the west side of the corridor between Jones Avenue and Jimmie Simpson Park. They relocate one set of tracks during this weekend closure and they’ll relocate a second set during another weekend in April.

Crews work 24 hours a day to:
- relocate barriers;
- cut and move rail tracks; and
- “surface” (compact), excavate, and back-fill ballast (the crushed stone that supports the tracks.)
They can’t complete these tasks while trains are operating and they must work overnight to make sure they have relocated the tracks in time to resume train service Monday morning.
Expect noise and vibration from construction equipment, including excavators, rail-cutting saws,
spike pullers, track surfacing equipment, rollers, loaders, dump trucks, and hand tools. Expect to see site lighting at night.
The contractors will schedule disruptive activities, including surfacing during the daytime, wherever possible. They’ll use noise barriers and coverings to reduce disruption. And, they’ll direct site lighting away from residences.
Trucks enter and exit the work zone at access points on Eastern or Pape avenues.