Due to the large and ever-changing footprint of Shell’s Athabasca Oil Sands Project, site security could not be accomplished using a traditional, physical fence (e.g. chain link). Instead, a *virtual fence* using a series of 24 free-standing mobile towers, each supporting a motion-activated video camera, was erected.
When activated, such as by wildlife or an unauthorized person, the system will alert site security personnel. The project replaced the cellular modems with point-to-point radios on all 24 mobile towers, which significantly improved the quality of video images and eliminated cellular data costs.