I'm working on simulation of a shopping mall , As people wait with trolleys in waiting-line near bill counter, the trolleys were merging with people without maintaining gap for trolleys . As trolley was positioned in-front of the person while moving and while waiting in line, the trolleys are merging in between people and the waiting line was looking like as there were only persons waiting in line with out trolleys.
The challenge here I'm facing is, How can I maintain certain gap in between people in waiting-line? (hoping that the gap will compensate space for trolleys in between each person)
PS: I'm working on process flow.