Unavailability of pf2 at dvg leading to crossing at either AVC or Tholhunse. So trains have to wait for long time in above mentioned stations til another train from opposite side clears the track. If one trains wait at AVC next one behind it will be waiting at Hrr. This is snowballing into huge delays. From Tholhunse to ubl is a single line which is further adding to delay.