Tailgating
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Tailgating is the action of a driver driving behind another vehicle while not leaving sufficient distance to stop without causing a
collision In physics, a collision is any event in which two or more bodies exert forces on each other in a relatively short time. Although the most common use of the word ''collision'' refers to incidents in which two or more objects collide with great for ...
if the vehicle in front stops suddenly. The safe distance for following another vehicle varies depending on various factors including vehicle speed, weather, visibility and other road conditions. Some jurisdictions may require a minimal gap of a specified distance or time interval. When following heavy vehicles or in less than ideal conditions (e.g. low light or rain), a longer distance is recommended, due to increased reaction times and stopping distances or because fatigue is most prevalent in long distance lorry driving.


Causes

There can be several reasons for tailgating.


Preventing cut ins

Tailgating can occur when a vehicle attempts to prevent another vehicle on the right or left from cutting in front of them. The tailgating (or preventing) vehicle will drive as close as possible to another leading vehicle to prevent the side vehicle from cutting in. Like all forms, this practice of tailgating is illegal and attempts to force the side vehicle to slow down and get into the line of traffic behind the tailgating vehicle. This practice may provoke road rage where one vehicle is blocking and another attempts to defy the block.


Negligence

Tailgating can occur because of a lack of perceived risk in so doing. Thus, it is done unconsciously or negligently, very often by people who consider themselves safe drivers and generally obey some other rules of the road. Evidence shows that more experienced drivers are more likely to be involved in rear-end collisions, possibly because they overestimate their skill and become complacent about allowing sufficient distance to avoid an accident.


Coercion

In its most uncivil form, it can be a case of road rage or
intimidation Intimidation is a behaviour and legal wrong which usually involves deterring or coercing an individual by threat of violence. It is in various jurisdictions a crime and a civil wrong (tort). Intimidation is similar to menacing, coercion, terro ...
. An example would be where the tailgating driver (the driver in the following vehicle) threatens damage to the leading vehicle and its occupants by driving aggressivelyperhaps also with use of headlights and hornto coerce the leading vehicle's driver into getting out of the way. The driver being tailgated might not wish to comply, especially if doing so would involve breaking the law, such as by increasing speed beyond the
speed limit Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed, express ...
or changing lanes without due regard for safety.


Aerodynamics

A form of deliberate tailgating known as slipstreaming, "draft-assisted forced stop", or "draft-assisted forced auto stop" (D-FAS) is a technique used by some hypermilers to achieve greater fuel economy. D-FAS involves turning off the engine and gliding in neutral while tailgating a larger vehicle in order to take advantage of the reduced wind resistance in its immediate wake. Note that this practice is extremely dangerous: while tailgating itself is inherently risky, the danger of collision is increased with D-FAS as power for power brakes can be lost after a few applications of the brake pedal and, with older cars, the pressure that causes power steering to function can be lost as well.


Trailing and columns

Tailgating may occur when the drivers of two vehicles do not want to be separated, the vehicles are in a procession (e.g. funeral), or the vehicles are maintaining a formation for security purposes (e.g. escorting a dignitary or a dangerous prisoner). Another sphere wherein tailgating has been observed is among drivers who are in a hurry, or other public road activity whose prerequisite is urgency or agitation.


Hazards of tailgating

Tailgating can be dangerous to the tailgater, especially if they are driving closely behind a large vehicle (such as a tractor-trailer, or gas tanker). By tailgating, the driver has a shorter distance to stop, decreases the margin of error and blocks the awareness of surroundings. If the leading vehicle decelerates suddenly (such as when encountering a traffic jam, traffic lights, avoiding pedestrians, etc.), the tailgater has a high risk of causing a rear-end collision, for which in insurance terms, they would always be held responsible. Brake checking is an exception to this, in which case the leading vehicle is generally the one held liable for damages. In many jurisdictions, a two second gap is recommended between any two successive moving vehicles, characterised in many countries by the slogan, "only a fool breaks the two second rule."


Prevention

Tailgating causes most rear-end crashes in South Australia. Some motorways in the United Kingdom, Canada and Australia feature certain road markings which can help resolve this problem. Consisting of an arrangement of chevrons, these remind the driver not to tailgate, and assist in the two second rule. Public goods vehicle license training in Britain states that lorries should increase the 2 second gap to the vehicle in front to 3 seconds when being tailgated to ensure that emergency braking can be a little gentler, to compensate for the tailgating vehicle behind having eaten up its own reaction time to almost nothing. In Germany, tailgating is punishable with a fine of up to €400. In case of gross
negligence Negligence ( Lat. ''negligentia'') is a failure to exercise appropriate care expected to be exercised in similar circumstances. Within the scope of tort law, negligence pertains to harm caused by the violation of a duty of care through a neg ...
, one or more penalty points are given and the driver's license may additionally be immediately suspended for up to 3 months.


References


External links


Tailgating Information
(Government of
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TRAFFIC AND CRIMES AMENDMENT (MENACING AND PREDATORY DRIVING) BILL
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parliament
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transcript where tailgating is noted as being an offense under the new legislation).
Tailgating Information
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Police Force safety advice
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Report on an anti-tailgating operation
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police) {{Authority control Hazardous motor vehicle activities