⁴ᴷ⁶⁰ (FULL ROUTE) SF MUNI Cable Car: PM Powell/Mason Line - to Downtown

As being a resident with the cable car as my home line, it's so much more reliable using it rather than the other parallel routes

Why is there a crossover near the Taylor and Bay turntable when these cars can only be driven on one end?

Its the T-Third Street Bus running all days for next few weeks (from Chinatown Station to Townsend and 4th)?