Proxy is a safety solution within speed zoning. Proxy is a solution which you can use for other applications as well besides speed control like notifying if the forks of the forklift are too high when driving through an entry, access control and so on.
Proxy works with a system of a receiver and tags. You can place the receiver on the vehicle and the tags somewhere in the warehouse. The receiver recognises the tags and causes an action. This can be used in potentially dangerous zones to lower the speed. You can also place the receiver at an entry or gate and place the tags on the vehicles. When the vehicle approaches the receiver the actio caused by the receiver could be: opening the gate automatically.