Check this screenshot,
NDO departure at 20:36,
MDKU update not available, schedule is 20:43, ok now we take it's distance 7 KM, as average 60kmph, it's will take 7 minutes, 20:36+00:07= 20:43, and depart from there and reach next halt.
Now TSR schedule is 20:55 but it arrives at 20:44, that means, 11 minutes before...
Travel...
more... distance is 4KM time taken only 1 minute. Here speed is 4kM in 1 minute, 240kmph