I think all rail systems have some small buffers build in. On the polish site which tracks punctuality of trains, you can often see train delayed for some time

I think all rail systems have some small buffers build in. On the polish site which tracks punctuality of trains, you can often see train delayed for some time, which decreases delay by every stop, eventually ending with smaller delay or on time. http://infopasazer.intercity.pl http://infopasazer.intercity.pl