What are the automated alternatives to a manual flagger? — answered by Engineer Saeed Baatiah
Three internationally proven options: a robotic flagging arm carrying a stop/slow paddle, operated remotely or on a timed sequence; variable message signs (VMS) displaying warnings and diversions that can be updated instantly; and automated directional flashing beacons that mark the lane with a visible light sequence day and night. All three run on solar power, so no mains supply is needed at a temporary site.