Police car in the context of "Emergency vehicle lighting"

A police bicycle is a bicycle used by police forces, most commonly in the form of a mountain bicycle, used to patrol areas inaccessible to police cars or cover a wider area than an officer on foot.

Bicycle patrols are often assigned to locations that police cars cannot access and that officers could not effectively cover on foot, such as dense urban areas, pedestrian zones, and public parks. The maneuverability of bicycles and their ability to navigate narrow and densely-packed areas easily and quickly offer advantages over police cars, though bicycles are slower than police cars, carry less equipment, and cannot be used to effectively enforce road laws, though they may still conduct traffic stops if possible; for example, a video of a Japanese bicycle officer stopping a Lamborghini Huracán, despite the massive speed difference between them, went viral in 2017.

Mirror writing is formed by writing in the direction that is the reverse of the natural way for a given language, such that the result is the mirror image of normal writing: it appears normal when reflected in a mirror. It is sometimes used as an extremely primitive form of cipher. A common modern usage of mirror writing can be found on the front of ambulances, where the word "AMBULANCE" is often written in very large mirrored text, so that drivers see the word the right way around in their rear-view mirror. It is also on fire engines and police cars too.

Some people are able to produce handwritten mirrored text. Notably, Leonardo da Vinci wrote most of his personal notes in this way.Mirror writing calligraphy was popular in the Ottoman Empire, where it often carried mystical associations.

A siren is a noise-making warning device. There are two general types: mechanical sirens and electronic sirens. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines.

Many fire sirens (used for summoning volunteer firefighters) serve double duty as tornado or civil defense sirens, alerting an entire community of impending danger. Most fire sirens are either mounted on the roof of a fire station or on a pole next to the fire station. Fire sirens can also be mounted on or near government buildings, on tall structures such as water towers, as well as in systems where several sirens are distributed around a town for better sound coverage. Most fire sirens are single tone and mechanically driven by electric motors with a rotor attached to the shaft. Some newer sirens are electronically driven speakers.

Law enforcement in Ukraine is a set of activities carried out by a system of dedicated government bodies, aimed at maintaining public order and internal security, ensuring integrity of the law and inevitability of punishment for breaking the law, guarding the national security as well as safety of people and their property. Most of law enforcement operations are carried out by the Ministry of Internal Affairs of Ukraine, but also by a number of independent agencies and agencies from other ministries.

The primary law enforcement agency in the country is the National Police of Ukraine, which is subordinate to the Ministry of Internal Affairs. Other prominent agencies include Security Service of Ukraine (an independent agency, responsible for national security, anti-terrorism, counter-intelligence and fighting organized crime), National Guard of Ukraine (part of MIA, the national gendarmerie) and State Bureau of Investigation (an independent agency, investigating misdemeanors and crimes committed by other law enforcement officers, judges, and high-ranking officials).

In police terminology, a beat is the territory that a police officer is assigned to patrol. Beats are used to effectively divide available officers across a law enforcement agency's jurisdiction, ensuring organized police presence across a wide area.

"Beat" often refers to specifically foot patrols or bicycle patrols, though "beat" can also be used to simply describe a designated area patrolled by a police officer through any means, such as an officer in a police car or police aircraft. "Police beat" is also used by news media to refer to reports on local crimes and police incidents, often crime reports detailing recent incidents and arrests handled by local law enforcement.

Law enforcement in the United Kingdom is organised separately in each of the legal systems of the United Kingdom: England and Wales, Scotland, and Northern Ireland. Most law enforcement duties are carried out by police constables of a territorial police force.

As of 2021, there were 39 territorial police forces in England, 4 in Wales, one in Scotland, and one in Northern Ireland. Each is responsible for most law enforcement and crime reduction in its police area. The territorial police forces of England and Wales are overseen by the Home Office and by a police and crime commissioner or other police authority, although they are operationally independent from government. The British Transport Police (BTP), the Ministry of Defence Police (MDP), and the Civil Nuclear Constabulary (CNC) provide specialist policing services in England, Scotland and Wales. The National Crime Agency (NCA) is primarily tasked with tackling organised crime and has been compared to the Federal Bureau of Investigation (FBI) in the United States.