Problem is most people are going from door to door, while your transit system makes you go to wherever it stops. Unless transit has some other large advantage it is going to be a worse choice for most individuals even given traffic. (separate tracks are a large advantage - but only if the tracks more or less go close to where you want to end up)
You misunderstood the question - not "is it better for me for this trip to drive or take a train?" but "is it better for me to have a city where people only drive or where many people take the train?"
I understand the question. However I reject it because the question gets those asking it where they want to be. If you want to make changes to make things "better" then you need to ask the right questions. The question isn't wouldn't it be nice if everybody takes transit - or even nearly everybody (acknowledging those that need to travel with a truck full of tools/parts). The useful question is how do you get the next potential rider on and keep the existing riders from buying a car when they have money.
