Service will be reduced in the daytime and early evening periods from Monday to Friday to better reflect customer demand. All weekday service will operate on the 510A (Spadina Stn-Union Stn) branch. 

In the morning peak period, combined service will be reduced from every four to five minutes to every seven minutes. In the midday period, combined service will be reduced from every five minutes to every seven to eight minutes. In the afternoon peak period, combined service will be reduced from every five minutes to every seven minutes. In the early evening period, combined service will be reduced from every four to five minutes to every seven to eight minutes.