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A major revision to the storm signal system took place in 1917 when the new local and non-local storm signal codes were introduced on 1 July. The new local code was the first numbered tropical cyclone signal system in Hong Kong, consisting of seven signals (1 to 7)providing a standby signal, gale signals in four directions (N'ly, S'ly, E'ly and W'ly), an increasing gale signal and a hurricane ...
The air traffic control radar beacon system ( ATCRBS) is a system used in air traffic control (ATC) to enhance surveillance radar monitoring and separation of air traffic. It consists of a rotating ground antenna and transponders in aircraft. The ground antenna sweeps a narrow vertical beam of microwaves around the airspace.
Radar warning receiver. Radar warning receiver ( RWR) systems detect the radio emissions of radar systems. Their primary purpose is to issue a warning when a radar signal that might be a threat is detected, like a fighter aircraft 's fire control radar. The warning can then be used, manually or automatically, to evade the detected threat.
Regulatory signs. Regulatory signs give instructions to motorists, pedestrians, and cyclists. Signs including Stop, Yield, No Turns, No Trucks, No Parking, No Stopping, Minimum Speed, Right Turn Only, Do Not Enter, Weight Limit, and Speed Limit are considered regulatory signs.
Traffic signal preemption (also called traffic signal prioritisation) is a system that allows an operator to override the normal operation of traffic lights.The most common use of these systems manipulates traffic signals in the path of an emergency vehicle, halting conflicting traffic and allowing the emergency vehicle right-of-way, thereby reducing response times and enhancing traffic safety.
Warning (traffic stop) When a traffic stop is made, a warning issued by the officer is a statement that the motorist has committed some offense, but is being spared the actual citation. Officers use their own discretion whether to issue a citation or warning. [1] The motorist may receive the warning either verbally or written, but will not be ...
The Tulsa race massacre, also known as the Tulsa race riot or the Black Wall Street massacre, [12] was a two-day-long white supremacist terrorist [13] [14] massacre [15] that took place between May 31 and June 1, 1921, when mobs of white residents, some of whom had been appointed as deputies and armed by city government officials, [16] attacked black residents and destroyed homes and ...
HAWK beacon. A HAWK beacon ( high-intensity activated crosswalk beacon) is a traffic control device used to stop road traffic and allow pedestrians to cross safely. It is officially known as a pedestrian hybrid beacon. The purpose of a HAWK beacon is to allow protected pedestrian crossings, stopping vehicular traffic only as needed.