Roll call should be carried out at a designated assembly point during an evacuation. This assembly point should be at a safe distance from the building (generally at least 50 meters) to avoid any hazards like fire, smoke, or falling debris. It should be easily accessible to everyone, including those with mobility challenges, and clearly marked with visible signage to avoid confusion. The assembly point must also be large enough to comfortably accommodate all evacuees and should not interfere with emergency services' work or be near fire hydrants, vehicle access points, or building entrances. The roll call is conducted there to confirm that all individuals are accounted for and safe, and to identify anyone missing so emergency responders can act accordingly.