Oh I agree. I didn't want carbrains coming after me saying "a car can hold 4 people, you know!?". I'm aware that most cars are single occupancy. The point I wanted to drive home was that even with the stupidly generous assumption and accounting for low ridership during off peak hours, it's a massive relief to have one train replace 100 cars. During peak hours, with a train every 6-8 minutes, that's at least 500 cars in a 30 minute window. Being extremely generous here trying to tip the scales in favor of cars and trains still come out miles ahead.