The Standard Emergency Warning Signal (SEWS) is a warning siren used in Australia to alert the public of danger. The siren is played over radio, television...

arises. The Standard Emergency Warning Signal was originally adopted by the Bureau of Meteorology in the 1970s for tropical cyclone warnings. It became...

A civil defense siren is a siren used to provide an emergency population warning to the general population of approaching danger. Initially designed to...

The Emergency Alert System (EAS) is a national warning system in the United States designed to allow authorized officials to broadcast emergency alerts...

effectiveness and provide audible warnings alongside the visual warnings produced by the lights. In many jurisdictions, the use of emergency lights may afford the...

siren signals, their meanings and the "requirements for their operation". Tsunami warnings are also issued over radio and to mobile phones via Emergency Mobile...

distribute the alert to local broadcast media (led by the Standard Emergency Warning Signal tone), SMS messaging and automated landline phone calls. Tornado...

signal they are approaching is clear or at caution. Depending on the upcoming signal state, the AWS will either produce a 'horn' sound (as a warning indication)...

The Emergency Broadcast System (EBS), sometimes called the Emergency Action Notification System (EANS), was an emergency warning system used in the United...

North Warning System Standard Emergency Warning Signal (Australia) Traffic Collision Avoidance System Train Protection & Warning System Tsunami warning system...

carry out a shunting move. Warning signal The warning signal is the most unusual of the three types of British permissive signal. It is, like the shunt-ahead...

Public Warning System (Singapore) Integrated Public Alert and Warning System Wireless Emergency Alerts ShakeAlert Standard Emergency Warning Signal Emergency...

406 MHz distress radio signal, which is used by search-and-rescue teams to quickly locate the emergency and render aid. The distress signal is detected by satellites...

activated when the signal is at danger. A train that passes the signal will have its emergency brake activated. If the train is travelling at speed, this may...

[citation needed] The hazard warning signal (sometimes called "hazard warning flashers", "hazard warning lights", "emergency lights", "4-way flashers",...

Hong Kong tropical cyclone warning signals are issued by the Hong Kong Observatory to warn of a potential threat or effects of a tropical cyclone in the...

The National Emergency Alarm Repeater (NEAR) was a civilian emergency warning device in the United States. It was a 2–3" (5–7.5 cm) square box designed...

Federal Signal Modulators (also known as Modulator Speaker Arrays) are electronic warning devices produced by Federal Signal Corporation that are used...

is a protocol used for framing and classification of broadcasting emergency warning messages. It was developed by the United States National Weather Service...

Broadcast Emergency population warning Emergency Alert System Emergency Public Warning System Four-minute warning CONELRAD UK's National Attack Warning System...

Japanese railway signals, according to the ministerial decree defining technical standards of railways (鉄道に関する技術上の基準を定める省令, Tetsudō ni kansuru gijutsu...

coordinate emergency alerts and warning messages through WEA and other public systems by means of the Integrated Public Alert and Warning System. The...

stop signal and a warning signal and can therefore, according to the needs of the position, present aspects of both a plain stop signal and a warning signal...

Public Warning System designed to disseminate emergency alerts to mobile phones based on Cell Broadcast technology, as defined by ETSI standards. National...

aspect, which gives the driver advance warning that the stop signal ahead may be displaying 'danger'. The distant signal is installed at roughly full braking...

The rainstorm warning signals are a set of signals used in Hong Kong to alert the public about the occurrence of heavy rain which is likely to bring about...

still recognized as a standard distress signal that may be used with any signaling method. It has been used as a visual distress signal, consisting of three...

The radiotelephony message PAN-PAN is the international standard urgency signal that someone aboard a boat, ship, aircraft, or other vehicle uses to declare...

technologies, including forward collision warning, automatic emergency braking, pedestrian automatic emergency braking, and adaptive lighting, among others...

ends”. A “Signal 30” could be a fatal car crash or any death, depending on local usage. Plain language helps ensure critical clarity in emergencies. It is...