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Friday, January 19, 2018

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Towing is coupling two or more objects together so that they may be pulled by a designated power source or sources. The towing source may be a motorized land vehicle, vessel, animal, or human, the load anything that can be pulled. These may be joined by a chain, rope, bar, hitch, three-point, fifth wheel, coupling, drawbar, integrated platform, or other means of keeping the objects together while in motion.

Towing may be as simple as a tractor pulling a tree stump. The most familiar form is the transport of disabled or otherwise indisposed vehicles by a tow truck or "wrecker." Other familiar forms are the tractor-trailer combination, and cargo or leisure vehicles coupled via ball or pintle and gudgeon trailer-hitches to smaller trucks and cars. In the opposite extreme are extremely heavy duty tank recovery vehicles, and enormous ballast tractors involved in heavy hauling towing loads stretching into the millions of pounds.

Necessarily, government and industry standards have been developed for carriers, lighting, and coupling to ensure safety and interoperability of towing equipment.

Historically, barges were hauled along rivers or canals using tow ropes drawn by men or draught animals walking along towpaths on the banks. Later came chain boats. Today, tug boats are used to maneuver larger vessels and barges. Over thousands of years the maritime industry has refined towing to a science.

Aircraft tow one-another as well. Troop and cargo carrying gliders are towed behind powered aircraft, which remains a popular means of getting modern leisure gliders aloft.


Video Towing



Types of trailers

This section refers to the towing of a cargo-carrying device behind a truck or car.

Most trailers fit into one of three categories:

  • Small trailers that attach to cars and small trucks (SUVs, minivans, etc.):
    • Small enclosed trailers are fully covered by four sides and a roof. These types of trailers are generally used for carrying livestock since they protect the contents from weather. People also rent these types of trailers for moving boxes, furniture and other materials.
    • Boat trailers are used specifically for pulling boats. These types of trailers are designed for easy loading in and out of the water and are purchased based on the specific type and style of boat they will be hauling. They are open trailers that are specially shaped to hold and secure boats, but because of this specialty, they are a unique category.
    • Recreational vehicles (RV) are utility vehicles or vans that are often equipped with living facilities. While some are self-propelled (integrated truck chassis), many are designed as trailers to be attached to a trailer hitch. These trailer hitches are common on the back of many cars and trucks, and RV trailers are commonly used for camping outings or road trips. In the United Kingdom, RV trailers are known as caravans.
  • Trailers designed to be hauled in a "big rig" (18-wheel) tractor-trailer configuration, which come in many configurations:
    • Flat bed or open trailers, which are platforms with no sides or stakes. This type of trailer works well for hauling large or unconventional shaped objects. Some are small enough to be towed behind cars.
    • Tank trailers, which are trailers designed to contain liquids such as milk, water or motor fuel.
    • Container trailers are standard intermodal "boxes" that can be fitted with a dolly (wheel truck) and front stand; they can then be used in a standard tractor-trailer combination. The containers are also stacked on ships and used as railroad boxcars.
    • Non-containerized tractor-trailer boxes are also fairly common, and work much like containters, above, but frequently with the stand and dolly integrated permanently into the box.
  • Trailers for speciality applications that may require a specialized vehicle, such as a farm tractor; military truck, tank, or personnel carrier; or an unusually large "big rig." Unpowered train cars pulled behind a locomotive can also be considered in this category.

Maps Towing



Towing safety

There are many safety considerations to properly towing a caravan or trailer / travel trailer starting with vehicle towing capacity and ranging through equalizer hitches to properly and legally connecting the safety chains.

According to the United States National Highway Traffic Safety Association, more than 65,000 crashes involving passenger vehicles towing trailers occurred in 2004 in the US, jumping nearly 20 percent from the previous year.

In 2006, Master Lock did their annual study on towing safety to see how many Americans tow their cargo correctly. The study, Towing Troubles included responses from trailer owners across the country and found that while the majority of trailer owners believe they know what they're doing when it comes to towing, most were lacking the proper education. Master Lock reported that 70 percent of trailer owners did not fully know the correct way to tow their cargo.

An important factor in towing safety is tongue weight, the weight with which the trailer presses down on the tow vehicle's hitch. Insufficient tongue weight can cause the trailer to sway back and forth when towed. Too much tongue weight can cause problems with the tow vehicle.


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Towbar wiring

Vehicle-specific

Of the many cars fitted with towbars, most are likely to have fitted towing electrics which are 'hidden' from the car. This electrical installation is commonly called 'By-pass electrics'. This system is used to protect the car's lighting systems from potential damage if wiring in a trailer should malfunction. It is a tried and tested system in very wide use. Bypass systems are found both in "universal" (non-vehicle-specific) systems and in dedicated and OEM systems.

Since the early 2000s, vehicle technology has moved forward introducing CANbus network systems which allowed the interaction of different systems, and also the detection of a trailer or caravan. In some cases, the manufacturers have not only designed automobiles to sense the presence of a trailer, but they have also created enhanced new features within the systems connected to the network. This actually makes it important that these particular vehicles can "see" the trailer or caravan. A few of these new features are for safety and stability, but most are merely convenience things like automatically switching off the rear fog light and parking sensors. The main new safety feature, appearing now on some cars, is the Trailer Stability Program which automatically turns on when a trailer detected in the network through the dedicated sensors.

Some of the advanced systems being introduced in certain vehicles, that may make use of detecting the presence of a trailer are: lane change assistant, brake electronics, adaptive cruise control, suspension system (ASS), engine electronics, engine cooling system, parking aids, and reversing camera.

TSP or Trailer Stability Program is one feature which has been added to some vehicles, to help correct the 'snaking' action of a trailer. With such advanced technology, some braking systems have even evolved further by being operated electronically, without the need for hydraulics. Braking can become more controlled with faster braking efficiency when towing. Some suspension systems can now detect a trailer and allow for a more level towing adjustment when the load is applied on the towing hitch. ACC (Adaptive Cruise Control) systems are meant to 'detect' a trailer in order to create a greater braking distance between vehicles. It might be considered unwise to bypass such vehicles' trailer detection systems as these vehicles may be designed to behave in a different way when a trailer is attached.

Some manufacturers either put a prepared connector in the vehicle which is a preparation on the network (Ford, Volvo) to accept a specially designed towing module, or have designed the trailer to be 'detected' through connections directly onto the databus (VAG, BMW). With such connections the vehicle will know when a trailer plug is connected to the socket.

On vehicles that do not have safety features that depend on the vehicle sensing the presence of a trailer, bypass systems, properly installed by expert fitters, are very efficient and cost effective alternatives to expensive OEM and other dedicated kits. All bypass kits will be type approved for use on vehicles (check for the (e) mark). They have the built-in advantage of completely isolating the trailer from the vehicle's lighting system, thus protecting against damage to the car caused by any failure within the trailer's wiring. However, a number of manufacturers do not recommend connections to be made on the lighting harnesses.

Universal by-pass electronics

This system is used to protect the car's lighting systems from potential damage if wiring in a trailer should malfunction. It is a tried and tested system in very wide use. Bypass systems are found both in "universal" (non vehicle-dedicated) systems and in dedicated and OEM systems. It works by taking a small current signal from the vehicle's lighting harness to trigger a relay and send a direct power supply to the towing socket. It does not communicate with the vehicle and will not activate any safety or convenience systems. It has the built-in advantage of isolating the trailer wiring from that of the towing vehicle and thus preventing overloading the vehicle's own lighting harness which may be minimal gauge cabling. The connection onto this harness will cause damage if solder or crimp connectors are used! However, by-pass systems should protect the car's electrical modules from damage should the wiring in a towed trailer malfunction. It is not advised for use in cars that depend on sensing the presence of a trailer to activate towing-related safety features within the car.(See Trailer Stability Programme). In addition to this, there are a number of vehicle manufacturers that do not recommend or actually ban any connections to be made from the vehicle lighting harness.

12N, 12S or 13-pin sockets

12N is the designation for the older 7-pin lighting socket conforming to ISO 1724, used when towing just a trailer or caravan (without the need for charge or fridge functions). In the UK it has all the functions of the rear lights on a vehicle except for reverse. These sockets are not waterproof and suffer from "pin burn-out" when worn.

12S is an additional 7-pin socket conforming to ISO 3732, mainly used when towing caravans. It consists of a permanent 12v power supply, and usually a switched 12v power supply for the fridge (UK). It also contains a feed for the reverse lights on the caravan.

ISO 11446 is the new 13-pin standard socket being fitted for all new U.K. caravans and trailers sold from 2009 onwards. It can be wired with the same functions as both the 12N and 12S sockets, or with just the lighting functions including reverse (required on all trailers and caravans from October 2012). The socket has been designed to be waterproof, easy to fit/remove (twist operation), the same size as one 12N socket (ideal for detachable towbars as unobtrusive), and with good fitting quality terminals that avoid any pin burnout or voltage failure.

Trailer Stability Program (TSP)

Another advance in trailer safety is the development of the Trailer Stability Program, built into some Electronic Stability Control systems in today's motor vehicles. These systems can detect the "snaking" of a trailer or caravan and counteract it by braking individual wheels, reducing engine torque and slowing the vehicle down. It is important to note that activation of TSP normally requires a vehicle-specific wiring loom to be installed.


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Towing capacity

Towing capacity is a measure describing the upper limit to the weight of a trailer a vehicle can tow and may be expressed in pounds or kilograms. Some countries require that signs indicating the maximum trailer weight (and in some cases, length) be posted on trucks and buses close to the coupling device.

For cars and light trucks, towing is accomplished via a trailer hitch. In addition to the vehicle limits, the hitch assembly may have its own set of limits, including tongue weight (the amount of weight that presses downward on the hitch) and trailer weight (the full weight of the trailer, including contents). When the hitch is a factory option, the hitch capacity is usually stated in the vehicle documentation as a towing specification, and not otherwise marked on the vehicle.

See also

  • Gross combined weight rating
  • Gross trailer weight rating
  • Gross vehicle weight rating

Towing capacity may either refer to braked or unbraked towing capacity.

Braked towing capacity

Braked towing capacity is the towing capacity of a vehicle if the trailer being towed has its own braking system, typically connected to the vehicle's braking system via the trailer cable. Braked towing capacity is typically significantly greater than unbraked towing capacity.

Unbraked towing capacity

Unbraked towing capacity is the towing capacity of a vehicle towing a trailer that does not have its own braking system.


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Types of towing hitches

There are many forms of tow hitch, including a ball hitch, tow bar, pintle and lunette ring, three-point, fifth wheel, coupling, and drawbar, among others.

The tow-ball is popular for lighter loads, readily allowing swivelling and articulation of a trailer. A tow pin and jaw with a trailer loop are often used for large or agricultural vehicles where slack in the pivot pin allows the same movements. A pintle and lunette is a very heavy duty hitching combination used in construction and the military.

In the case of towing hitches designed to carry other vehicles, there are more specialized types, described immediately below.


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Towing of vehicles

Towing of cars and trucks is a unique form, with an industry dedicated to it. Specialized "tow truck" vehicle types are most often used. Some of these are flatbed, with hydraulic tilting beds and winches and dollies to position the car behind the bed and pull it up onto the bed. Others have a specialized boom hitch instead of a flatbed, which will lift one end of the car and allow it to ride on its remaining tires; they otherwise have similar equipment to the flatbeds and position and perform much like them. In other cases, a specialized vehicle dolly can be attached to a standard vehicle hitch; for example, some moving vehicle rental companies, such as U-Haul, will rent these dollies for one-way transport of cars.

Hitch tow trucks are mostly sized for cars and light duty trucks. Larger versions, with a long, weighted body and heavier duty engines, transmissions, and tow hooks, may be used for towing of disabled buses, truck tractors, or large trucks. The artificial sizing and weighting must be designed to withstand the greater weight of the towed vehicle, which might otherwise tip the tow truck back.

When many cars are to be transported, rather than using a specialized vehicle, a specialized trailer may be used instead, attached to a standard tractor truck or other large vehicle. These "motor carriers" often bring cars from factories to dealers. They typically have two levels that each hold 3-5 cars, ramps for moving the cars from ground to either level, and hook/chain ties and mounts to secure the cars for transport. Their beds, on each level, may have channels or tracks to guide loading and further maintain transport stability.

Vehicle towing may be performed for the following reasons:

  • Towing of disabled or damaged car at request of owner (the most common form)
  • Towing of car by government authorities or its agents, due to being disabled and/or abandoned on a public thoroughfare
  • Towing a car as a form of long distance shipping, such as during its owner's move to a new location, rather than driving the car
  • Repossession of a car by a lender
  • As part of impoundment of vehicles by government agencies for infractions involving the vehicle in question, such as unpaid parking or moving violations ("tickets")

Dispatching

Requests for service are placed to a dispatching center. Some tow services communicate with drivers using wireless telephone equipment. In others, the dispatching center contacts an available tow truck driver via mobile radio or by sending a text message using a mobile data terminal. Recent technology includes the use of GPS and on board wireless equipment to dispatch drivers via an LCD screen receiver.

Some smaller towing companies, especially single-truck owner-operator outfits, may have only a single telephone and answering device for their "dispatch center." Increasingly, this will just be a mobile phone for the operator on duty, or may be the main telephone number for an associated mechanic, who will then send the truck from the shop or call the operator's mobile phone.

Dispatching networks exist for geographic automobile clubs, such as the British Royal Automobile Club, the American Automobile Association, and the Canadian Automobile Association. These organization primarily contract with many local tow truck operators (though they do have fleets of their own in some areas). The clubs will re-dispatch the requests from the club dispatch center to the local operators dispatch line, which, as above, may be a true dispatch center for larger tow fleets, or a simple business telephone line or mobile line for smaller operators. The club dispatch center will typically handle any follow-up needed on behalf of the customer, so that they do not need to track the multiple levels of dispatching.

Impounds and storage

Many tow companies can store vehicles that have been wrecked or impounded by police agencies. In these circumstances, police agencies notify a contracted towing provider to secure the vehicle and tow it to a storage lot. The tow company will sometimes prevent access to the vehicle until the law states the owner can claim it (usually after any fines are paid). Some local governments operate their own towing and impound lots, and don't need a contracted provider.

Nearly all tow companies charge a fee for storing vehicles.

GPS and AVL

Navigation systems are becoming more commonly used to tell the location (of stranded vehicles) to tow trucks. Automatic vehicle location (AVL) systems are sometimes used to help the dispatch center staff determine the closest tow truck. AVL may use GPS technology. It may display the location of all tow trucks on a map or may feed data directly to a computer-assisted dispatch system which automatically recommends the closest available units.


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Laws and regulations on the towing of vehicles

This section refers specifically to the laws of various countries regarding the towing of a car or truck by a specialty wrecker or tow truck.

The towing industry is known to have substantial potential for abuse, as towing most often occurs in difficult situations, without many options for the consumer to turn to. In addition, in certain situations, towing operators may initiate a towing procedure that is unwarranted, and the consumer may be forced to make a payment to the operator before the vehicle is released. Various consumer citizen protection laws have been enacted by many jurisdictions to protect the consumer for predatory towing or predatory towing charges.

Other laws may govern training and licensing of tow truck operators and businesses, safety equipment, safe practices, and special permits for operating on certain roadways or in certain areas.

Towing law in the United States

In the United States, several states have laws that regulate the circumstances under which a car may be towed. Some of these laws are designed to prevent "predatory towing" whereby a legally parked vehicle is towed -- or an illegally parked vehicle is towed by a towing operator unaffiliated with the parking facility (private or public) -- in order to charge high fees from the owner. Even when the predatory tow is stopped, if the vehicle is already hooked up to the tow truck in any fashion, the car is essentially disabled until the operator releases it, and the operator can therefore extort money from the consumer.

Even where towing is performed legally, and even with the consumer's request for a tow, the towing company gains physical possession of the vehicle. The towing fees may be unexpectedly high in the absence of regulation.

In some jurisdictions, kidnapping laws may ban the towing of occupied vehicles. The majority of states require additional mirrors for the vehicles, that tow something behind them. The requirements and regulations differ from state to state. In general, towing mirrors are an addition to the factory vehicle mirrors, that allow seeing farther. The standard mirrors are crafted to reflect what is behind the vehicle, and when a trailer is towed, they reflect the trailer. To see what's behind it, one needs bigger mirrors that span the coverage of what's behind the trailer. There are three main types of the towing mirror:

  • Permanently mounted mirrors. They screw into the fender or door of the vehicle and remain in place.
  • Clip-on mirrors. They mount right on the OE mirror by means of a plastic housing, that completely envelopes the mirror that is on the vehicle.
  • Extension mirrors. This type of mirrors is mounted to the OE mirror with the help of a bar, that is clipped onto the edge of the plastic mirror housing.

California

California law requires the tow company to immediately and unconditionally release a vehicle if the driver arrives prior to it being towed from the private property and in transit. The intent was to avoid the likelihood of dangerous and violent confrontation and physical injury to vehicle owners and towing operators, the stranding of vehicle owners and their passengers at a dangerous time and location, and impeding expedited vehicle recovery, without wasting law enforcement's limited resources.

Illinois

In October 2008, McHenry County, Illinois rescinded an earlier decision to put the Illinois Commerce Commission in charge of towing, in an effort to address "predatory towing."

Maryland

Maryland towing industry representatives testified to a state task force in October 2008 that nearly all complaints are the fault of "gypsy towers" and "snatch-and-grabbers."

New Jersey

Some limited access highways, especially the Garden State Parkway and the New Jersey Turnpike, require specially designated towing businesses to be the only tow operators on them. This is to allow for better traffic flow and safety, as not all tow operators are familiar with the roads, access points and turnaround points, road construction quirks, and methods to quickly and safely remove disabled cars from the roadway. There is also the concern of arrival delay; the roadway authorities wish to avoid out of area tow companies, as the delay for arriving from far away increases the length of traffic delays in time and distance.

Oregon

Oregon law requires that the tower release a vehicle at no charge only if the driver is present prior to the hookup being complete. The tower must also take at least one photograph of the vehicle and record the time and date of the photograph. The photograph must show the vehicle violation taking place.

Virginia

Virginia and its municipalities have enacted anti-"predatory towing" legislation. Some features of the legislation include the requirement to post warning signs at all entrances, setting maximum fees for towing and storage, and requiring photographs to be taken before towing to show the condition of the vehicle as well as the lawfulness of the towing.

Towing law in Australia

All Australian States have laws which regulate the towing industry, particularly that part of the industry engaged in towing light and heavy vehicles involved in road accidents.

Queensland

The Tow Truck Regulation 2009 is the legislation in State of Queensland which governs smash/accident towing; in regulated areas of the state. The scheme sets economic, occupational and general consumer protection controls over the accident towing industry.

In April 2013, the Queensland Government approved amendments to the Police Powers and Responsibilities Act 2000, regarding motor vehicle impoundment with the aim of improving road safety.

On November 1, 2013, State of Queensland the amended legislation commenced as the countries toughest anti-hooning laws.

From May 1, 2014, Australian towing company Tow.com.au was contracted by the Queensland Police Service as the exclusive provider of towing & impoundment relating to hoon type 1 & type 2 offences in State of Queensland.

Victoria

The Accident Towing Services Act is the prime towing industry statute in the State of Victoria. The scheme sets economic, occupational and general consumer protection controls over the accident towing industry. First, the statute restricts the number of accident towing vehicles across the State and also contains a scheme regulating the orderly allocation of tow trucks to road accident sites. Second, the Act sets minimum standards on the character of industry participants and also regulates the behaviour of participants once they enter the industry.

The framework of offences in the Act broadly seeks to give practical effect to the "chain of responsibility" concept in the accident towing sector. The concept seeks to identify the industry parties who are in a sufficient position of control over risks, in this case potentially unsafe and unethical conduct following road accidents, and to allocate responsibility through law accordingly in order to deter and punish those behaviours.

The behavioural controls in the Act cover a wide range of activities and practices including the allocation of tow trucks to accident sites in "controlled areas" and conduct at road accident sites and during post accident repair work. The scheme was broadly prompted by consumer protection sentiment, in particular, the recognition of the vulnerability of road accident victims. Care was evident during development of the scheme to maintain and enhance existing character standards in the sector due to past behavioural issues in Victoria including the infiltration of criminal elements into some areas and conflict at accident scenes.

In broad terms, the Accident Towing Services Act regulates the accident towing industry in Victoria by -

  • establishing a licensing scheme for the tow trucks which provide accident towing services
  • requiring the accreditation of operators of accident towing service businesses and managers of the depots from which accident tow trucks operate
  • requiring the accreditation of accident tow truck drivers
  • establishing requirements and protections relating to the storage and repair of motor vehicles following road accidents.

Towing law in the European Union

As of the 1st of August 1998 all Passenger Carrying Vehicles up to 3500 kg Gross Vehicle Weight (M1 Vehicles) can only be fitted with European Type Approved towbars if the vehicle has received European Whole Vehicle Type Approval. Non M1 vehicles, Light Commercial Vehicles and private imports from outside the EEC are not required to use Approved Towbars.


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See also

  • Vehicle recovery
  • Tow truck
  • Tugboat
  • Tow hitch
  • Trailer Brake Controller
  • Trailer Connector
  • Dolly (trailer) - supports the front wheels of a second vehicle
  • Trailer stability program
  • Accident Towing Services Act
  • Roadside assistance

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References


Scottsdale Tow Truck Company - Best Towing Service in Scottsdale, AZ
src: www.scottsdaletowtruckcompany.com


External links

  • Towing capacity changes
  • National Highway Traffic Safety Association

Source of article : Wikipedia