Some person said why coro needs 30 or 15 min slack b/n mas-ogl
Just see this slot from GDR to Ogl
Other slots before coro reach GDR passing
Coro is clubbed in such a slot that it needs slack time or min 4 hrs for safe run also ogl-bza 20-30 mins extra slack
One...
more... need to check congestion of trains at that time goods train roam too in GDR-ogl-bza section in day time more than passenger trains