PSE&G maintenance vehicles carry a kit of 4 Eflare beacons that are used during maintenance actives at night.
The Eflare AT700B series beacon is used by network rail in the UK for the purpose of demarcating residual electrical hazards and/or limits of isolation. This range of products carries full Network Rail Product Acceptance and can be used in multiple locations during maintenance or construction work.
Washington Metro uses red Eflare beacons to indicate that tracks are closed for maintenance.
Toronto transit has been using blue Eflare beacons for over 10 years in track maintenance and construction of new track.