The TTC will close the Yonge line between Bloor and Eglinton on Saturday for emergency track work in an area where problems are increasingly affecting subway service.

The 60-year-old track bed near the Davisville station needs replacing, but the TTC hasn’t decided how to do that without an extended closure. So between closing on Friday night and noon Saturday, crews will tamp down the stones that support the tracks, and check the switches and signals that have been at the root of recent subway delays.

The subway line will open at 6 a.m. Saturday as usual and operate between Finch and Eglinton stations and between Bloor and Downsview. There will be 35 shuttle buses to ferry riders between Bloor and Eglinton until the line reopens at noon.

The TTC has had a “slow order” on that section of track for the past couple of years. The track bed should have been replaced 20 years ago, but budget constraints have delayed the work.