TTC subway closures this weekend will disrupt the kickoff of spring festivities in Toronto, and transit users relying on a central stretch of the network may want to put their solstice celebrations on hold. The TTC has announced that it will halt subway service on the Line 1 Yonge-University route between St. Clair West and St. Andrew stations, starting at 11:59 p.m. on Friday, March 20 and lasting through Sunday, March 22. This planned closure of the approximately 5.5-kilometre stretch of Toronto's busiest transit line is just the latest in a series of weekend service disruptions that the TTC blames on "planned track work." Only a portion of the outage will be covered by replacement shuttle buses, with the stretch from St. Clair West to St. George stations to receive shuttle service. The remaining stations south towards St. Andrew will not be covered by replacement bus service, and commuters will instead be expected to walk or take surface transit to the nearest station on the eastern leg of Line 1. The TTC has posted a notice for passengers with alternative routes to help navigate the closure. Dupont, Museum, Queen's Park, St. Patrick and Osgoode stations will be closed throughout the weekend-long outage, along with the Kendal Avenue entrance at Spadina Station. Other stations will remain open for passengers to purchase fares and connect with surface routes. Service on Line 1 will be back to normal in time for the start of the morning rush on Monday, March 23, at around 6 a.m.