Positive protection is defined by Federal Highway Administration (FHWA) as "devices that contain and/or redirect vehicles and meet the crash worthiness evaluation criteria contained in NCHRP Report 350." By this definition, positive protection devices should prevent intrusion into the work area. These guidelines address the use of positive protection devices in work zones.
The Colorado Division of Wildlife wants your bee hive operation to be successful. This publication will help you construct a secure enclosure. Besides protecting your hives, an enclosure also benefits wildlife it keeps them away from human-produced sources of food and keeps them in the wild where they belong.