Your suggestin seems very useful, but hard to implement. On KR route many trains are running, and there must be more than 50 sations. For arrival and departure, time it is say 100 stations and multiplying it by number of trains will bring figure to at least 5000 , if take 50 trains passing by this route. Then changing the entries of 5000 arrival/departure mannually is hard task, by any single person. Further after monson is over, again one has to revert back to normal timetable, this is just herculean task that is hard to accomplish.There is no automatic updation/programme that can do it. Only alternative for moderator is to provide a tab in main train page is 'monson time table' where ful time table will be brought by programme only. Thus normal timetable as well as monsoon timetable , both will be sitting side by side.