The number of subway closures due to TTC inspections, repairs and upgrades will jump to 43 next year, up from 35 this year, the TTC says in a new report.

The closures will mean more disruption for riders, forcing them to alternate routes including shuttle buses. The TTC says the inconvenience — mostly on weekends, when there are fewest users — is necessary to have safe, reliable and efficient service the rest of the year.

The increase is primarily to allow construction of the Yonge St.-Eglinton Ave. interchange station for the new Eglinton Crosstown LRT line. The closures will also allow TTC staff to continue installing the automatic train control (ATC) signalling system, which will allow the agency to run more trains at higher speeds and with more reliable travel times, and to perform routine “state of good repair” maintenance.

The TTC says not all the work can be done overnight when the subway is closed, adding that one full weekend closure adds working time equivalent to five weeks of night work.

In addition to closures, the TTC is planning seven Sunday subway openings after the normal 8 a.m. start.

TTC will alert riders before each closure.

Here are the planned subway closures and late Sunday openings for 2018:

Jan. 13-14, Line 1: St. Clair W. to Union

Feb. 3-4, Line 1: St. Clair W. to Union

Feb. 10-11, Line 1: St. Clair to Lawrence

Feb. 17-18, Line 1: St. Clair to Lawrence

Feb. 24-25, Line 1: St. Clair to Sheppard

March 3-4, Line 1: St. Clair to Lawrence

March 10-11, Line 1: St. Clair W. to Union

March 17-18, Line 3: Kennedy to McCowan

March 30-April 1, Line 1: Wilson to Finch W.

April 14-15, Line 2: Kipling to Jane

April 21-22, Line 1: St. Clair W. to Union

April 28-29, Line 2: Woodbine to Kennedy

May 6, Line 3: Kennedy to McCowan

May 12-13, Line 1: St. Clair to Lawrence

May 13, Line 2: St. George to Broadview — Late opening, service starts by noon

May 19-20, Line 1: St. Clair to Lawrence

May 26-27, Line 1: Lawrence W. to Finch W.

May 27, Line 2: St. George to Broadview — Late opening, service starts by noon

June 2-3, Line 1: St. Clair to Sheppard

June 9-10, Line 1: Lawrence W. to Finch W.

June 10, Line 2: St. George to Broadview — Late opening, service starts by noon

June 16-17, Line 1: St. Clair to Sheppard

June 24, Line 3: Kennedy to McCowan

June 30-July 1, Line 1: St. Clair to Lawrence

July 7-8, Line 1: St. Clair to Sheppard

July 8, Line 2: St. George to Broadview — Late opening, service starts by noon

July 14-15, Line 1: St. Clair to Lawrence

July 21-22, Line 1: St. Clair to Sheppard

Loading... Loading... Loading... Loading... Loading... Loading...

July 22, Line 2: St. George to Broadview — Late opening, service starts by noon

July 28-29, Line 1: Lawrence W. to Finch W.

Aug. 11-12, Line 1: St. Clair to Finch

Aug. 18-19, Line 1: St. Clair to Lawrence

Aug. 25-26, Line 1: Lawrence W. to Finch W.

Sept. 1-2, Line 1: St. Clair to Lawrence

Sept. 8-9, Line 1: St. Clair to Lawrence

Sept. 9, Line 2: St. George to Broadview — Late opening, service starts by noon

Sept. 15-16, Line 1: Bloor to Union

Sept. 22-23, Line 1: St. Clair to Sheppard

Sept. 23, Line 2: St. George to Broadview — Late opening, service starts by noon

Oct. 6-7, Line 1: Bloor to Union

Oct. 13-14, Line 1: St. Clair to Sheppard

Oct. 20-21, Line 1: St. Clair to Lawrence

Oct. 27-28, Line 1: St. Clair to Sheppard

Nov. 3-4, Line 1: St. Clair to Lawrence

Nov. 10-11, Line 1: Bloor to Union

Nov. 17, Line 3: Kennedy to McCowan

Nov. 24-25, Line 1: St. Clair to Lawrence

Dec. 1, Line 1: Bloor to Union

Dec. 8-9, Line 1: St. Clair to Lawrence