What's interesting is that the business case reveals the planned future SkyTrain operating pattern and frequency. Note everything can still change, but this is probably what they use to determine how much trains to order...
2028 Peak
Waterfront - 140th St (1/3) - 5m 54s (5,460 pphpd)
Waterfront - Langley (1/3) - 5m 54s (5,460 pphpd)
Waterfront - Production (1/3) - 5m 54s (5,460 pphpd)
Combined Expo - 1m 58s (16,380 pphpd)
Lafarge - Arbutus (1/1) - 3m 24s (7,920 pphpd)
Waterfront - YVR (1/2) - 5m 30s (3,130 pphpd)
Waterfront - Brighouse (1/2) - 5m 30s (3,130 pphpd)
Combined Canada - 2m 45s (6,260 pphpd)
2028 Off-Peak
Waterfront - 140th St (1/4) - 10m (3,220 pphpd)
Waterfront - Langley (1/4) - 10m (3,220 pphpd)
Waterfront - Production (2/4) - 5m (6,440 pphpd)
Combined Expo - 2m 30s (12,880 pphpd)
Lafarge - Arbutus (1/1) - 5m (5,390 pphpd)
Waterfront - YVR (1/2) - 6m 40s (2,580 pphpd)
Waterfront - Brighouse (1/2) - 6m 40s (2,580 pphpd)
Combined Canada - 3m 20s (5,160 pphpd)
2035 Peak
Waterfront - 140th St (1/3) - 5m (6,800 pphpd)
Waterfront - Langley (1/3) - 5m (6,800 pphpd)
Waterfront - Arbutus (1/3) - 5m (6,800 pphpd)
Combined Expo - 1m 40s (20,400 pphpd)
Lafarge - Arbutus (1/2) - 5m (5,390 pphpd)
Combined Millennium - 2min 30s (12,190 pphpd)
Waterfront - YVR (1/2) - 4m (4,300 pphpd)
Waterfront - Brighouse (1/2) - 4m (4,300 pphpd)
Combined Canada - 2m (8,600 pphpd)
2035 Off-Peak
Waterfront - 140th St (1/4) - 10m (3,400 pphpd)
Waterfront - Langley (1/4) - 10m (3,400 pphpd)
Waterfront - Production (2/4) - 5m (6,800 pphpd)
Combined Expo - 2m 30s (13,600 pphpd)
Lafarge - Arbutus (1/1) - 5m (5,390 pphpd)
Waterfront - YVR (1/2) - 6m 40s (2,580 pphpd)
Waterfront - Brighouse (1/2) - 6m 40s (2,580 pphpd)
Combined Canada - 3m 20s (5,160 pphpd)
2050 Peak
Waterfront - 140th St (1/3) - 4m 30s (7,560 pphpd)
Waterfront - Langley (1/3) - 4m 30s (7,560 pphpd)
Waterfront - Arbutus (1/3) - 4m 30s (7,560 pphpd)
Combined Expo - 1m 30s (22,680 pphpd)
Lafarge - Arbutus (1/2) - 4m 30s (7,560 pphpd)
Combined Millennium - 2m 15s (15,120 pphpd)
Waterfront - YVR (1/2) - 4m (6,660 pphpd)
Waterfront - Brighouse (1/2) - 4m (6,660 pphpd)
Combined Canada - 2m (13,320 pphpd)
2050 Off-Peak
Waterfront - 140th St (1/4) - 10m (3,400 pphpd)
Waterfront - Langley (1/4) - 10m (3,400 pphpd)
Waterfront - Production (2/4) - 5m (6,800 pphpd)
Combined Expo - 2m 30s (13,600 pphpd)
Lafarge - Arbutus (1/1) - 4m 30s (6,800 pphpd)
Waterfront - YVR (1/2) - 6m 40s (4,000 pphpd)
Waterfront - Brighouse (1/2) - 6m 40s (4,000 pphpd)
Combined Canada - 3m 20s (8,000 pphpd)
Note: all the capacity are 85% of "crush load" capacity. So by 2050, the planned "crush load" capacity for each of the line during peak hours are:
Expo: 26,700 pphpd
Millennium: 17,800 pphpd
Canada: 15,670 pphpd
With the current plan, Canada Line will be running at max capacity, Expo Line will be close.
I guess when UBC extension opens, they'll just extend all the Arbutus service to UBC? So we may actually get to see a UBC-Waterfront train after all
Source:
https://www2.gov.bc.ca/assets/gov/transp...appendices/appendix_d_ridership_memo.pdf