There are a number of methods and instruments used in crowd control situations the world over.
It could be just a queue control situation. It could be a mob control situation. It could be a serpentine line and has to be managed well. It could be a huge shrine and an important occasion and you have to manage the crows.
Whatever be the situation, there are a few things which are absolutely important for the crowd control. One, you need good set of stanchions. You would need a good looking velvet rope if the context is something like in an airport where the crowd behaviour is very good and decent.
However, you need to think of erecting good solid barricades if you are going to be dealing with mobs and unexpected violent behavior might erupt at some point in time.
