On Saturday March 22 and Sunday March 23, GO buses replace train service at all stations, except Milliken, Agincourt and Kennedy GO.  Additionally, some late-night service on Friday, March 21 will be adjusted. 

Friday, March 21:  

• The 10:12 p.m. train trip departing Union Station has been extended and will now stop at Stouffville and Old Elm GO.  

• The 12:12 a.m. train will be replaced with GO bus route 71C. Replacement buses will run direct to Unionville GO and make all stops at Centennial, Markham, Mount Joy, Stouffville, and Old Elm GO.    

• The 1:32 a.m. Route 70 bus at Old Elm GO will have a seven-to-twelve-minute connection time (one minute less or four minutes more than usual).   

Saturday, March 22 and Sunday, March 23   

Southbound towards Union Station; 

• Route 71C will run from Old Elm GO making all stops at Stouffville, Mount Joy, Markham, Centennial, and Unionville GO, then run direct to Union Station Bus Terminal. 

• Route 71E will run from Mount Joy GO making all stops at Markham, Centennial, and Unionville GO, then run direct to Union Station Bus Terminal.  

• Customers transferring to Route 70 at Old Elm GO will have a six-to-11 min connection (two minutes less or three minutes more than usual). 

• Customers transferring to Route 70 at Mount Joy GO will have a four-to-19 min connection (four minutes less and six minutes more than usual). 

Northbound toward Unionville/ Old Elm GO; 

• Route 71C will run direct from Union Station Bus Terminal to Unionville GO, making all stops at Centennial, Markham, Mount Joy, Stouffville, and Old Elm GO. 

• Bus route 71E will run direct from Union Station Bus Terminal to Unionville GO, making all stops at Centennial, Markham, and Mount Joy GO. 

• Customers transferring from Route 70 to rail replacement buses at Old Elm GO will have a 16 min connection (one minute more than usual). 

• Customers transferring from Route 70 to rail replacement buses at Mount Joy GO will have a seven-to-12 min connection (between three and eight minutes less than usual). 

 Customer travelling to Union Station from Milliken, Agincourt, and Kennedy GO, please consider TTC options; 

• Milliken GO: Take TTC bus Route 53A west to Finch Station, transfer to TTC Line 1 southbound to Union Station.  

• Agincourt GO: Take TTC bus Route 57 south to Kennedy Station, and transfer to TTC Line 2 westbound. Exit at Yonge/ Bloor Station, and transfer to TTC Line 1 south bound to Union Station.  

• Kennedy GO: Take TTC Line 2 to Yonge/ Bloor Station, transfer to TTC Line 1 southbound to Union Station. 

Check schedules before you travel.   

Lakeshore East service Adjustments March 22- 23: 

There will also be Lakeshore East service adjustments throughout the weekend. Learn more about the Lakeshore East service adjustments.

Connecting between GO and TTC?   

Save with One Fare. One Fare applies when you pay your fare with a physical PRESTO card, PRESTO in Mobile Wallet, or with a contactless credit or debit card. It does not apply for cash fare or ticket products. You must use the same card throughout your entire trip.  

What type of construction work is happening?  

This construction is necessary as we make progress to deliver the East Harbour Transit Hub. This will be a vital connection for customers transferring between the Ontario Line and GO train services. With a shared concourse providing easy access to all the rail services that will serve East Harbour, more customers will be able to transfer from the GO train to the subway network to get to more places. This important connection between the subway network and GO rail services will also help relieve crowding at Union Station by up to 14 per cent – or 14,000 people - during the busiest travel hour. Visit Ontario Line’s East Harbour station for more information. We are also continuing to increase track capacity by making sufficient space for a fourth track, improve operational flexibility for Metrolinx trains and reduce the long-term maintenance costs of the Birchmount bridge structure.