The worst is the squeal of the wheels against the track in the semicircular tunnel from Waterfront to Burrard (or in the reverse direction), in the summer, when

The worst is the squeal of the wheels against the track in the semicircular tunnel from Waterfront to Burrard (or in the reverse direction), in the summer, when people leave windows open. I think this is due to the axles being solid: no differential spin.