ah thx , this is easier to understand
so the city right in the midle is a HUB ? , one station (5 track ?) covering the blue , the red and the yellow line ?
cause in this case , if your blue line have good frequency (less than 2 min) , ppl will use the yellow line to reach the HUB , then take the blue line right ? making the pink line totaly useless
what about the red line covering the city terminus of the yellow line , ppls use this line insted of the other maybe cause there is more frequency ? , i don’t understand the meaning of the yellow line then cause that cover less city than the red line , with probably more waiting time (in both side btw)
the only thing i need to know is the frequency of the yellow line in this case , cause if there is 20 min waiting time , of course ppl will not use it