Safetyman - you will come across the standard guidance to keep vehicles and pedestrians apart wherever possible - which I'm sure you are doing. In a past life when I was involved in distribution centres when I had similar issues, get all parties involved from the operations e.g. DC management plan one way systems where ever possible. Location Management Teams - get them to locate products so the pick flows and place fast moving lines where pickers don't not bunch up in the aisles or in turning points in the aisles. Heavy items in the first aisles so that cages or pallets build and the staff don’t have to rearrange loads as they are picking therefore keeping them moving. It’s the simple stuff that makes the difference as ever. DP