Yes it is, the hearses are often queued up waiting their turn to get in.
There are 2 'Chapels' at a crematorium each does a cremation every 15 mins. 3 cremations are in progress at each chapel at any one time.
One lot is assembling outside in the waiting area, one lot is in the chapel for the service and one lot are outside in the 'garden area looking at the floral tributes, before leaving. The staff have just a couple of minutes to clear away one set of flowers and put out the next lot. That is why I will never take flowers to a cremation, they are only on show for 15 minutes then they get dumped unless the family take them home.
That is why I always have a laugh to myself when the cremation staff insist that every body is cremated separately. A cremation takes 8 hours in the furnace , then 2 hours for cooling and bone crushing. There are 2 furnaces per chapel so 4 furnaces for 396 bodies, you do the maths!