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Cab over

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Volvo FH16.700.jpg
Volvo FH cab-over lorry
Overview
ManufacturerVarious
Also calledCOE, forward control
Production1899–present
AssemblyWorldwide
Body and chassis
ClassLight, medium, and heavy
Body styleCab over engine

Cab-over, also known as cab over engine (COE), cab forward (U.S.), flat nose (Canada), or forward control (UK), is a body style of truck, bus, or van that has a vertical front, "flat face" or a semi-hood, with the cab of the truck sitting above (or forward of) the front axle. This contrasts with a conventional truck where the engine is mounted in front of the driver.

This truck configuration is currently common among European and Asian truck manufacturers. European regulations set restrictions for both the total length and the length of the load area, which allow a cab length of 2.35 m (7 ft 8+12 in) in combination with the maximum load area length. This allows a sleeper cab with a narrow bunk, and would allow a bonneted (hooded) day cab. Nonetheless, no manufacturer in Europe produces such day cabs with bonnets. The last manufacturer of a conventional in Europe, Scania, stopped production in 2005. (The reason was a decline to less than 1000 units worldwide, with European sales declining by 50% and sales in South America by 90%, within one decade.) Generally speaking, Asian regulations are even stricter, and the relatively shorter journey distances allow more heavy trucks to forgo sleepers to save even more length.

The cab-over configuration is common for garbage trucks, as the short wheelbase allows a tight turning radius and the low cab height eases driver entry and exit.
The cab-over configuration is common for garbage trucks, as the short wheelbase allows a tight turning radius and the low cab height eases driver entry and exit.

Cabover trucks are widely used in the United States for refuse collection, terminal tractors, and other vocational applications requiring a tight turning radius or frequent ingress/egress by the driver. Autocar, the oldest surviving motor vehicle manufacturer in America, produces primarily cabover trucks. Although cabover trucks were popular among United States heavy truckers and trucking companies during the 1970s because of strict length laws in many states, when those length laws were repealed, most heavy-truck makers moved to other body styles. One of the reasons is the Federal Bridge Formula, which is unique to the US, and encourages spreading out the load. If axle distances are too tight, the maximum load allowance is reduced. For COEs operated at maximum weight in the US, this required an axle directly behind the front bumper. This cab design caused an awkward climb into the cab for the driver, forcing them to climb up behind the front wheel, then moving to the front and into the cab. European or Chinese or Japanese truckers enter their cab in a straight fashion with handrails left and right.

Cabovers are also very popular in the US's light- and medium-duty truck segment where compact size is required for urban mobility without sacrificing payload; Toyota subsidiary Hino, Isuzu, and Mitsubishi Fuso models are a regular sight for this reason. American company Paccar (which owns the Kenworth and Peterbilt brands) still manufactures traditional cab over engine designs for the Australian and South African markets where length restrictions still make them advantageous.

In Australia, both American (cab over axle) and European/Japanese/Chinese (cab forward of axle) types, as well as the conventional type are common. Cab over engine types dominate urban and light duty use, with conventional trucks predominating in remote and off-road areas. Both types are common for highway use.

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Cab forward

Cab forward

The term cab forward refers to various rail and road vehicle designs that place the driver's compartment substantially farther towards the front than is common practice.

Bus

Bus

A bus is a road vehicle that carries significantly more passengers than an average car or van. It is most commonly used in public transport, but is also in use for charter purposes, or through private ownership. Although the average bus carries between 30 and 100 passengers, some buses have a capacity of up to 300 passengers. The most common type is the single-deck rigid bus, with double-decker and articulated buses carrying larger loads, and midibuses and minibuses carrying smaller loads. Coaches are used for longer-distance services. Many types of buses, such as city transit buses and inter-city coaches, charge a fare. Other types, such as elementary or secondary school buses or shuttle buses within a post-secondary education campus, are free. In many jurisdictions, bus drivers require a special large vehicle licence above and beyond a regular driving licence.

Axle

Axle

An axle or axletree is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to the vehicle, with the wheels rotating around the axle. In the former case, bearings or bushings are provided at the mounting points where the axle is supported. In the latter case, a bearing or bushing sits inside a central hole in the wheel to allow the wheel or gear to rotate around the axle. Sometimes, especially on bicycles, the latter type of axle is referred to as a spindle.

Europe

Europe

Europe is a continent comprising the westernmost peninsulas of Eurasia, located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It shares the continental landmass of Afro-Eurasia with both Africa and Asia. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east. Europe is commonly considered to be separated from Asia by the watershed of the Ural Mountains, the Ural River, the Caspian Sea, the Greater Caucasus, the Black Sea and the waterways of the Turkish Straits.

Asia

Asia

Asia is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometers, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which has long been home to the majority of the human population, was the site of many of the first civilizations. Its 4.7 billion people constitute roughly 60% of the world's population, having more people than all other continents combined.

Autocar Company

Autocar Company

The Autocar Company is an American specialist manufacturer of severe-duty, Class 7 and Class 8 vocational trucks, with its headquarters in Birmingham, Alabama. Started in 1897 in Pittsburgh, Pennsylvania, as a manufacturer of Brass Era automobiles, and trucks from 1899, Autocar is the oldest surviving motor vehicle brand in the Western Hemisphere.

Federal Bridge Gross Weight Formula

Federal Bridge Gross Weight Formula

The Federal Bridge Gross Weight Formula, also known as Bridge Formula B or the Federal Bridge Formula, is a mathematical formula in use in the United States by truck drivers and Department of Transportation (DOT) officials to determine the appropriate maximum gross weight for a commercial motor vehicle (CMV) based on axle number and spacing. The formula is part of federal weight and size regulations regarding interstate commercial traffic. The formula is necessary to prevent heavy vehicles from damaging roads and bridges. CMVs are most often tractor-trailers or buses, but the formula is of most interest to truck drivers due to the heavy loads their vehicles often carry.

Hino Motors

Hino Motors

Hino Motors, Ltd., commonly known as Hino, is a Japanese manufacturer of commercial vehicles and diesel engines headquartered in Hino, Tokyo. The company was established in 1942 as a corporate spin-off from previous manufacturers.

Kenworth

Kenworth

Kenworth Truck Company is an American truck manufacturer. Founded in 1923 as the successor to Gersix Motor Company, Kenworth specializes in production of heavy-duty and medium-duty commercial vehicles. Headquartered in the Seattle suburb of Kirkland, Washington, Kenworth has been a wholly owned subsidiary of PACCAR since 1945, operating alongside sister company Peterbilt Motors.

Australia

Australia

Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. Australia is the largest country by area in Oceania and the world's sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a megadiverse country, and its size gives it a wide variety of landscapes and climates, with deserts in the centre, tropical rainforests in the north-east, and mountain ranges in the south-east.

Japan

Japan

Japan is an island country in East Asia. It is situated in the northwest Pacific Ocean and is bordered on the west by the Sea of Japan, extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans an archipelago of 14,125 islands, with the five main islands being Hokkaido, Honshu, Shikoku, Kyushu, and Okinawa. Tokyo is the nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto.

China

China

China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. With an area of approximately 9.6 million square kilometres (3,700,000 sq mi), it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two special administrative regions. The national capital is Beijing, and the most populous city and largest financial center is Shanghai.

History

Vintage COE: 1942 Chevrolet
Vintage COE: 1942 Chevrolet
Preserved International Harvester Metro Van in Portland, Oregon in 2012
Preserved International Harvester Metro Van in Portland, Oregon in 2012

The first truck in the United States was built by Autocar in 1899 using a format then called "engine-under-the-seat" and was available with optional 3.7 or 6.0 kilowatts (5 or 8 hp) motors.[1] Although early Autocar trucks were not exactly "cab-over", since the truck did not have a cab, per se, they were the fore-runners to COEs. The Sternberg company of Wisconsin produced cab-over trucks as early as 1907, though by 1914 only their seven-ton model was a cab-over. They reintroduced the cab-over layout in 1933 with their "Camel Back" model, which allowed the cab to be tilted to access the engine.[2]

The introduction of the first modern cab-over layout in the United States is credited to industrial designer Viktor Schreckengost, who, with engineer Ray Spiller, designed a cab-over truck for the White Motor Company in 1932. Schreckengost was later joined by other designers such as Raymond Loewy who designed the Metro series of vans and trucks for International Harvester. The bodies for these vehicles were initially produced by the Metropolitan Body Company (MBC). The company produced a wide variety of truck and commercial bodies for several vehicle manufacturers such as Chevrolet, Ford, Dodge Bros., and International Harvester until 1948 when they were purchased by the latter. MBC was instrumental in the development of COE route delivery bodies in the 1930s.[3]

The laws of the time limited overall truck length to 12.8 metres (42 ft) on highways. Setting the cab over the engine and front axle shaved several feet off the length of the tractor, feet which could then be added to the length of the trailer while keeping the dimensions of the entire truck within the permissible limit. Schreckengost patented the design in 1934.

Autocar reintroduced the engine-under-the-seat format with their Model U in 1933, which became a staple of U.S. roads and the U.S. military through World War II and well into the 1950s.[1]

White-Freightliner introduced its first tilting cab-over design in 1958, which allowed the entire cab to tilt forward for access to the engine.[2]

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Chevrolet

Chevrolet

Chevrolet is an American automobile division of the American manufacturer General Motors (GM). Louis Chevrolet (1878–1941), Arthur Chevrolet and ousted General Motors founder William C. Durant (1861–1947) started the company on November 3, 1911 as the Chevrolet Motor Car Company. Durant used the Chevrolet Motor Car Company to acquire a controlling stake in General Motors with a reverse merger occurring on May 2, 1918, and propelled himself back to the GM presidency. After Durant's second ousting in 1919, Alfred Sloan, with his maxim "a car for every purse and purpose", would pick the Chevrolet brand to become the volume leader in the General Motors family, selling mainstream vehicles to compete with Henry Ford's Model T in 1919 and overtaking Ford as the best-selling car in the United States by 1929 with the Chevrolet International.

Autocar Company

Autocar Company

The Autocar Company is an American specialist manufacturer of severe-duty, Class 7 and Class 8 vocational trucks, with its headquarters in Birmingham, Alabama. Started in 1897 in Pittsburgh, Pennsylvania, as a manufacturer of Brass Era automobiles, and trucks from 1899, Autocar is the oldest surviving motor vehicle brand in the Western Hemisphere.

Wisconsin

Wisconsin

Wisconsin is a state in the upper Midwestern United States. Wisconsin is the 25th-largest state by total area and the 20th-most populous. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north.

Viktor Schreckengost

Viktor Schreckengost

Viktor Schreckengost was an American industrial designer as well as a teacher, sculptor, and artist. His wide-ranging work included noted pottery designs, industrial design, bicycle design and seminal research on radar feedback. Schreckengost's peers included designers Raymond Loewy, Norman Bel Geddes, Eva Zeisel, and Russel Wright.

White Motor Company

White Motor Company

The White Motor Company was an American automobile, truck, bus and agricultural tractor manufacturer from 1900 until 1980. The company also produced bicycles, roller skates, automatic lathes, and sewing machines. Before World War II, the company was based in Cleveland, Ohio. White Diesel Engine Division in Springfield, Ohio, manufactured diesel engine generators, which powered U.S. military equipment and infrastructure, namely Army Nike and Air Force Bomarc launch complexes, and other guided missile installations and proving grounds, sections of SAGE and DEW Line stations, radars, Combat Direction Centers and other ground facilities of the U.S. aerospace defense ring, such as the Texas Towers.

Raymond Loewy

Raymond Loewy

Raymond Loewy was a French-born American industrial designer who achieved fame for the magnitude of his design efforts across a variety of industries. He was recognized for this by Time magazine and featured on its cover on October 31, 1949.

Van

Van

A van is a type of road vehicle used for transporting goods or people. Depending on the type of van, it can be bigger or smaller than a pickup truck and SUV, and bigger than a common car. There is some variation in the scope of the word across the different English-speaking countries. The smallest vans, microvans, are used for transporting either goods or people in tiny quantities. Mini MPVs, compact MPVs, and MPVs are all small vans usually used for transporting people in small quantities. Larger vans with passenger seats are used for institutional purposes, such as transporting students. Larger vans with only front seats are often used for business purposes, to carry goods and equipment. Specially-equipped vans are used by television stations as mobile studios. Postal services and courier companies use large step vans to deliver packages.

Truck

Truck

A truck or lorry is a motor vehicle designed to transport cargo, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construction, with a cabin that is independent of the payload portion of the vehicle. Smaller varieties may be mechanically similar to some automobiles. Commercial trucks can be very large and powerful and may be configured to be mounted with specialized equipment, such as in the case of refuse trucks, fire trucks, concrete mixers, and suction excavators. In American English, a commercial vehicle without a trailer or other articulation is formally a "straight truck" while one designed specifically to pull a trailer is not a truck but a "tractor".

International Harvester

International Harvester

The International Harvester Company (often abbreviated by IHC, IH, or simply International was an American manufacturer of agricultural and construction equipment, automobiles, commercial trucks, lawn and garden products, household equipment, and more. It was formed from the 1902 merger of McCormick Harvesting Machine Company and Deering Harvester Company and three smaller manufacturers: Milwaukee; Plano; and Warder, Bushnell, and Glessner. Its brands included McCormick, Deering, and later McCormick-Deering, as well as International. Along with the Farmall and Cub Cadet tractors, International was also known for the Scout and Travelall vehicle nameplates. In the 1980s all divisions were sold off except for International Trucks, which changed its parent company name to Navistar International.

World War II

World War II

World War II or the Second World War, often abbreviated as WWII or WW2, was a global conflict that lasted from 1939 to 1945. The vast majority of the world's countries, including all of the great powers, fought as part of two opposing military alliances: the Allies and the Axis. Many participants threw their economic, industrial, and scientific capabilities behind this total war, blurring the distinction between civilian and military resources. Aircraft played a major role, enabling the strategic bombing of population centres and the delivery of the only two nuclear weapons ever used in war.

Freightliner Trucks

Freightliner Trucks

Freightliner Trucks is a US semi truck manufacturer. Founded in 1929 as the truck-manufacturing division of Consolidated Freightways, the company was established in 1942 as Freightliner Corporation. Owned by Daimler AG from 1981 to 2021, Freightliner is now a part of Daimler Truck subsidiary Daimler Truck North America.

Design aspects

The 1962 Sisu KB-112/117 was the first European serial produced truck with a hydraulically tiltable cabin, enabling easy access to the engine.
The 1962 Sisu KB-112/117 was the first European serial produced truck with a hydraulically tiltable cabin, enabling easy access to the engine.
A Mack F series truck

In Class 8 tractors (using the US designation), the cab-over design allows the vehicle's wheelbase to be shorter than in the conventional arrangement, wherein the engine is placed in front of the cab, covered by a horizontal or sloping hood that opens to allow engine access. Its shorter wheelbase allows cab-over semi trucks to have a shorter overall length, thereby allowing for longer trailers to be used. For light- and medium-duty solid- or rigid-axle trucks, the cab-over design requires less length for the cab and engine, in a given wheelbase, and therefore allows a greater length for the truck body or load area.

In both class 8 tractors and light- and medium-duty vocational trucks, the cab-over-engine design gives the COE model an advantage in maneuverability over a conventional model. And since COEs are generally lighter than conventionals, they can often haul heavier loads, given equal gross vehicle weight rating (GVWRs) and gross combination weight rating (GCWRs). Despite the COE designs' being smaller in general, over-the-road tractors can still be fully equipped with single or bunk beds. Also, lack of a hood gives better visibility to the driver and a tighter turning radius, and significantly reduces the forward blind spots.

One critique is that the shorter wheelbase in the COE semi-trucks gives a rougher ride than those with conventional cabs, as the driver's seat is above the front axle. In the 1970s, COEs used to be noisier, because the engine is directly below. This was an important consideration back then: Interior noise in the cab was between 80 and 90 db(A), creating an unhealthy work environment.[4] As of 2017, US long distance trucks provide an interior noise level of 60–70 db(A) at highway speed, while European long distance trucks, all built as a COE, provide a level of 60–65 db(A). As highway speeds are a slightly higher in the US, this performance can be viewed as equivalent.

Because of their flat front design, early COE semi-trucks had significantly worse aerodynamics than conventional tractors. Modern cab-over designs, in both semi-trucks and light- and medium-duty models, have improved aerodynamics significantly over early models, but often still have higher drag coefficients than their modern conventional-design counterparts. This works against fuel economy, and offsets some of the improvement in fuel consumption garnered from the lighter weight of the cab-over truck when running less than fully loaded.

Although the tilting cab gives comparatively unobstructed access to the engine, its deployment causes unsecured items in the cab and sleeper (if equipped) to fall onto the windshield or under the instrument panel.[5] Vehicles without a tilting cab will usually be equipped with removable floor panels through which mechanics can access and service the engine. In Europe, Mercedes-Benz was the last manufacturer to use such panels instead of a tilting cab, with the last non-tilting cabs produced well into 1983.

Safety aspects

Tatra 813 Kolos 8x8 Drive Military Truck
Tatra 813 Kolos 8x8 Drive Military Truck
Land Rover 101 Forward Control with radio-vehicle body
Land Rover 101 Forward Control with radio-vehicle body

Truck occupant safety depends on survival space within the cab, with "rollover" being the most significant heavy truck accident causing occupant casualties. [6] In the 1950s, when many truck cabs were still wooden structures, knowledge about the most common accidents was already established, and led to the first mechanized truck cab crash test in 1959, performed by Volvo. The test became a Swedish standard, and was adopted by the European Community in simplified form as ECE R-29 in 1974. During the early 1980s, the safest place for a truck driver was a European truck, usually a cabover.

Decision-making is based on human perception in first place, results of statistics might not be present. Motor placement before or under the cab does not have much influence on the results of rollovers. Behind the danger of a rollover, heavy truck on heavy truck crashes are the second most relevant reason for occupant casualties. With a 1980s US conventional, the result of such a crash was: Frame, front axle and wheels would go under the truck in front, while the motor got pushed into the cab (which was very small in a 1980s conventional).[7][8] Contrary to these real-world results, the motor in front, which would crush the truck driver in an crash, was nonetheless perceived as "protection", and this perception was an important factor for the adoption of these trucks in the US, during the 1980s.

Both conventionals and cabovers need structural protection against rollovers, and special protection against massive objects at the height of another truck body. The survival space should be able to move backward on the frame.

In military use, the COE design increases the chance of crew injury or death in the event of running over a landmine. This is because the tire that detonates the mine is directly below/beside the driver.[9]

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Sisu KB-112

Sisu KB-112

Sisu KB-112 is a three-axle lorry made by the Finnish heavy vehicle manufacturer Suomen Autoteollisuus (SAT) from 1962 though 1969. The vehicle was equipped with a technically advanced tiltable cabin. A two-axle variant, the KB-117, was produced from 1964 through 1969. Both versions were only produced in small numbers.

Mack F series

Mack F series

The Mack F series was the third generation of cabover trucks from Mack Trucks. Its production began in 1962 and ended in 1981. It was produced primarily as a set-forward axle truck but a setback axle version was shipped overseas. The cab came in a 50 inch day cab. Sleeper models included a 72 inch, 80 inch and later a "bustle back" was added that lengthened the sleeper to 86 inches.

Wheelbase

Wheelbase

In both road and rail vehicles, the wheelbase is the horizontal distance between the centers of the front and rear wheels. For road vehicles with more than two axles, the wheelbase is the distance between the steering (front) axle and the centerpoint of the driving axle group. In the case of a tri-axle truck, the wheelbase would be the distance between the steering axle and a point midway between the two rear axles.

Semi-trailer truck

Semi-trailer truck

A semi-trailer truck, also known as a semitruck, is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel.

Trailer (vehicle)

Trailer (vehicle)

A trailer is an unpowered vehicle towed by a powered vehicle. It is commonly used for the transport of goods and materials.

Axle

Axle

An axle or axletree is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to the vehicle, with the wheels rotating around the axle. In the former case, bearings or bushings are provided at the mounting points where the axle is supported. In the latter case, a bearing or bushing sits inside a central hole in the wheel to allow the wheel or gear to rotate around the axle. Sometimes, especially on bicycles, the latter type of axle is referred to as a spindle.

Drag coefficient

Drag coefficient

In fluid dynamics, the drag coefficient is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment, such as air or water. It is used in the drag equation in which a lower drag coefficient indicates the object will have less aerodynamic or hydrodynamic drag. The drag coefficient is always associated with a particular surface area.

Mercedes-Benz Actros

Mercedes-Benz Actros

The Mercedes-Benz Actros is a heavy-duty truck introduced by Mercedes-Benz at the 1996 Commercial Vehicle IAA in Hanover, Germany as the replacement for the SK. It is normally used for long-distance haulage, heavy duty distribution haulage and construction haulage. It is powered by an inline-6 diesel engine with turbocharger and intercooler. Daimler Trucks/Lorries launched the version II of the Actros in 2002, and the version III in 2007. The fourth generation of the Actros, named officially "the New Actros", launched in July 2011

Tatra 813

Tatra 813

The Tatra T813 was a truck produced in Czechoslovakia by the Tatra company. It was produced from 1967 to 1982. The basic representative of this series was a military version of the 8×8 Kolos (Colossus), which was able to pull trailers up to a total weight of 100 tons. Tatra also produced a civilian version in either 6×6 or 4×4. After fifteen years of production, 11,751 vehicles were built in all modifications. Many units were exported to the USSR, East Germany, Romania and India.

Land Rover 101 Forward Control

Land Rover 101 Forward Control

The 101 Forward Control or Land Rover 101FC was a light utility vehicle produced by Land Rover for the British Army. It was not available to the public off the production line, but was as military surplus.

Source: "Cab over", Wikipedia, Wikimedia Foundation, (2023, February 6th), https://en.wikipedia.org/wiki/Cab_over.

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See also
References
  1. ^ a b "Company". Archived from the original on 8 February 2015. Retrieved 23 August 2016.
  2. ^ a b Holtzman, Stan (1995). American Semi Trucks. MBI Publishing Company. pp. 82–85. ISBN 0-7603-0038-0.
  3. ^ Staff. "Metropolitan Auto and Carriage Co., Metropolitan Body Co". Retrieved 14 December 2013.
  4. ^ Reif, Zygmunt F.; Moore, Thomas N.; Steevensz, Arthur E. (February 1980). Noise Exposure of Truck Drivers. Vehicle Noise Regulation and Reduction Session. Detroit: Society of Automotive Engineers.
  5. ^ Richards Award Winning Kenworth Cabover
  6. ^ Herbst, Brian R.; Forrest, Stephen M.; Meyer, Steven E.; Clarke, Christopher C.; Bell, Lauren D.; Oliver Nelson, Arin (2015). Test Methods for Occupant Safety in Heavy Truck Rollovers (PDF). RCOBI Conference. Retrieved 7 November 2017.
  7. ^ "Castro Valley: Lanes reopen after big-rig fatal wreck blocks I-580 for hours". East Bay Times. US. 14 September 2017. Retrieved 6 November 2017. Photo 5 shows the engine pushed into the cab on a conventional truck
  8. ^ Old Truck Crash Test. Archived from the original on 19 December 2021 – via YouTube. COE crash tests from the 1970s on a 1975 Volvo F609 COE
  9. ^ Ramasamy, A.; Hill, A.M.; Hepper, A.E.; Bull, A.M.J.; Clasper, J.C. (2009). "Blast Mines: Physics, Injury Mechanisms And Vehicle Protection" (PDF). JR Army Med Corps Journal.com. 155 (4): 258–264. doi:10.1136/jramc-155-04-06. hdl:10044/1/6074. PMID 20397600. S2CID 15023180. Archived from the original (PDF) on 10 May 2012. Retrieved 20 June 2012.

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