If we are already dealing with infinities of peoples then we can deal just as easily with infinities of tracks. I just struggle to see what kind of power source the trolly uses to plow through that many people.
The real question for me is what unit of distance would be used for the integer representation… It could take 1 meter, 1 Km, 1 Au, or even 1 Infinity to represent the distance between every person and the next. Also, are we using a linear or logarithmic scale?
This is not to mention the lack of info on how fast the train is going, and whether or not it’s accelerating.