Hi Hoyt - there's a Fence/Gate symbol already available. Would this not be suitable? I'm not sure what you mean when you say you want this to be triggered separately from other symbols when sharing/downloading - are you looking to show detours on the map? You can plot detours using the Plot a Detour tool in the route planner toolbar.
Please create an annotation for barricades and cones so that the same map can be used for full mapping purposes. Also, allow the barricade/cone annotation to be triggered separately on and off from the other symbols when sharing/downloading a map so that it can be as versatile as possible.