Abstract: According to the subject matter of the present disclosure, an automated warehouse environment is provided where designated materials handling vehicles are programmed to initiate permission inquiries at primary and secondary nodes of a travel route in the warehouse environment. Alternatively, or additionally, the present disclosure also presents an automated warehouse environment where an asset manager comprises an occupancy grid generator, and a designated materials handling vehicle is programmed to avoid otherwise unpermitted travel along path segments that overlap the locked cells of the occupancy grid.