Trailer bus

{{short description|Bus formed out of a bus bodied semi-trailer pulled by a conventional tractor unit}}

{{See also|Bus trailer (disambiguation)}}

Image:Praha, Holešovice, Výstaviště, Návěs NO 80 II.JPG) exhibited in Prague]]

Image:Strandexpress Ammeland - mit dem Trecker über die Insel (2019).jpg, the Netherlands]]

A bus (also known as a trailer bus) is a trailer vehicle designed specifically for the transportation of passengers (a bus). Trailer buses typically comprise one of two forms:

  • a semi-trailer pulled by a tractor unit (in the same way as a semi-trailer truck). The tractor unit may either be a purpose-built unit designed specifically for operation with the trailer bus, or a regular conventional tractor unit.
  • a full trailer pulled by a conventional bus, typically to provide extra capacity. Also referred to as a 'bus trailer'.

Although semi-trailer buses are now typically obsolete and have been retired, full trailer buses attached to conventional buses remain in use in limited applications around the world, including as tourist vehicles.

History

In 1922 a 65-seater passenger trailer bus went into service for the Department of Parks and Boulevard of Detroit, which was developed by Fruehauf Trailer Corporation, also from Detroit. The bus was 29 ft long, made up of steel chassis and cabin built of natural oak with tram like interior. For comfort the trailer had leaf spring suspension, air vents and four doors for easy access, the doors were interconnected with brakes and were controlled via the tractor unit hauling the trailer. The tractor was a six wheeled Packard tractor unit which was coupled with the trailer via a fifth wheel, making the turning radius as small as 39ft.{{Cite web |title=A 65-SEATER, SIX-WHEELED TRACTOR-BUS. {{!}} 15th August 1922 {{!}} The Commercial Motor Archive |url=https://archive.commercialmotor.com/article/15th-august-1922/24/a-65-seater-six-wheeled-tractor-bus |access-date=2024-06-08 |website=archive.commercialmotor.com}}

An early trailer bus was designed in Amsterdam in the 1920s as bus designs got longer. As a solution to possible grounding hazards on humped bridges, three prototypes were built in 1924, but proved to be problematic, and later converted to rigid bodies in 1927.[http://homepages.cwi.nl/~dik/english/public_transport/odds_and_ends/bus.html An early articulated bus from Amsterdam] {{Webarchive|url=https://web.archive.org/web/20080302231425/http://homepages.cwi.nl/~dik/english/public_transport/odds_and_ends/bus.html |date=2008-03-02 }}

File:Royal Air Force in the Middle East, 1944-1945. CM5691.jpg trailer bus in the Middle East, 1944.]]

In 1930 Nairn Transport Company which ran 550 miles of transport services from Damascus to Baghdad experimented with a trailer bus which was hauled by a Buick Roadster which had a very successful run motivated by this the company later built a customized double-decker trailer bus in 1934 which had carry capacity of 40 passengers divided in first class and normal class. The bus also had reclining seats, an onboard kitchen and a luggage capacity of approximately 700kgs. The trailer was hauled by a Marion-Herrington 6x6 tractor powered by a 188hp Hercules engine, which helped it cover the route in 24 hours. At that time, it was the longest bus ever made with a length of 80ft and weighed 26 tons, making it one of the first successful trailer buses.{{Cite web |title=The unknown story of truck-based buses for Nairn, the impossible desert route from 70-100 years ago {{!}} TimelessDriving |url=https://timelessdriving.com/news/2022/12/The-unknown-story-of-truck-based-buses-for-Nairn-the-impossible-desert-route-from-70-100-years-ago/ |access-date=2024-06-05 |website=TimelessDriving.com |language=English}}

During World War II and in the immediate post-war years, trailer buses were turned to as a simple and economical way of providing bus transport to replace worn out conventional bus fleets. The semi-trailers were basic and uncomfortable, but each could carry more passengers than an ordinary single-decker bus, and nearly as many as a double-decker bus. In India BEST of Mumbai and BMTC of Bangalore had double-decker trailer buses in its fleet during the 1970s and 1980s.[http://www.natgeotraveller.in/vintage-photos-time-travelling-with-mumbais-iconic-best-buses Vintage Photos: Time-Travelling With Mumbai's Iconic BEST Buses]

{{Webarchive|url=https://web.archive.org/web/20180227210958/http://www.natgeotraveller.in/vintage-photos-time-travelling-with-mumbais-iconic-best-buses/ |date=2018-02-27 }}

In Australia, 123 semi-trailer type buses were built from 1939. Large purchasers included Parramatta-Ryde Bus Service and Rover Coaches.{{cite book|last=Travers|first=Greg|title=The Australian Articulated Bus|date=1987|publisher=Transit Australia Publishing|location=Sydney|isbn=090945910X}} A 1947 semi-trailer coupled with an American-built 1943 White M3A1 tractor is preserved at the Sydney Bus Museum in Sydney. The Sydney exhibit was the last trailer bus used in NSW, withdrawn in 1977.[https://web.archive.org/web/20120210150549/http://www.sydneybusmuseum.com/exhibs/015.htm 016] Sydney Bus Museum

Trailer buses were also used in Perth, Western Australia by several private bus companies from 1943 onwards, including Metro Buses (formerly Metropolitan Omnibus), Pioneer Omnibus and Scarborough Bus Services. The units were bodied by various companies, including Boltons, Campbell & Mannix and Motor Body Builders, a subsidiary of Scarborough Bus Services. From 1958 onwards, many trailer buses passed to the state-owned Metropolitan Transport Trust as the private operators were bought by the Western Australian Government. A number were also purchased by the Western Australian Government Railways from 1945 to 1948, with the trailer bodies built by Fowler Constructions and Campbell & Mannix.

In 1948, ten British-built[http://www.lbpt.org/702b.html Cobham Bus Museum] {{Webarchive|url=https://web.archive.org/web/20080705093801/http://www.lbpt.org/702b.html |date=2008-07-05 }} Trailer Bus exhibit details trailer buses saw service as staff canteens for London Transport (in country green livery)[http://ccmv.fotopic.net/p27033125.html CCMV - Classic Commercial Motor Vehicles] {{Dead link|date=July 2018 |bot=InternetArchiveBot |fix-attempted=no }} A fotopic image of the London transport staff canteen trailer bus with one passing to the Cobham Bus Museum in 1972.

A large order for 1,175 buses from the Dutch Railways for buses from Crossley included an order for 250 trailer buses, each to carry 52 seated and 28 standing passengers.[http://www.crossley-motors.org.uk/history/postwarbus.html www.crossley-motors.org.uk] The Crossley Dutch buses The tractor units were delivered as short Crossley DD42s, and these were matched in the Netherlands with DAF built trailer chassis fitted with bus bodies.

From 1967 to 1968 the Indian city of Mumbai had double-decker trailer buses with seating capacity of 100 passengers, run by Brihanmumbai Electric Supply and Transport company. The city of Kolkata and Bengaluru also had such buses.{{cite news | url=https://economictimes.indiatimes.com/news/politics-and-nation/west-bengal-govt-plans-to-switch-to-electric-mode-in-public-transportation-in-kolkata-by-2030/articleshow/71688298.cms | title=West Bengal govt plans to switch to electric mode in public transportation in Kolkata by 2030 | newspaper=The Economic Times}}

In the late 1980s, a Mexican-built trailer bus was in test service in the Los Angeles / Orange County area of California. In the 1990s, Orange County Transportation Authority used it on two express routes. The trailer buses were known as Superbuses.[http://www.subchat.com/buschat/readflat.asp?Id=80766 PHOTOS - OCTD SuperBuses]

Custom motor/trailer units manufactured by Orion Bus Industries were used from 1985 to 2012 on the Niagara Parks Commission People Mover route in Niagara Falls, Ontario.

In Greece trailer buses are still often used for tours, usually in small villages. Trailer buses are also used in some kids' attractions.{{cite web |last1=Λαμία: Παιδιά το τρενάκι σας πάει βόλτα στην πόλη! (βίντεο) |first1=Λαμία: Παιδιά το τρενάκι σας πάει βόλτα στην πόλη! (βίντεο) |title=Λαμία: Παιδιά το τρενάκι σας πάει βόλτα στην πόλη! (βίντεο) |url=https://www.larissanet.gr/2019/12/21/lamia-paidia-to-trenaki-sas-paei-volta-stin-poli-vinteo/ |website=larissanet.gr |date=21 December 2019 |access-date=25 October 2020}}

Obsolescence

As early as the mid-1940s, trailer buses began to quickly fall out of favor for a variety of factors:{{cite book |first=Dirk HR |last=Spennemann |title=Buses Up & Down the Murray: The Murray Valley Coach Company of Albury retrospect |publisher=Albury |year=2006 |isbn=978-1-921220-03-6 |pages=78–9}}

  • The length of trailer buses made them difficult to negotiate sharp turns at narrow street corners;
  • Each trailer bus normally required a two-person crew, with the driver in the tractor and the conductor in the semi-trailer;
  • The perceived danger of a passenger-laden semi-trailer dislodging from its tractor while under way has led to many jurisdictions in the United States, Canada and Australia restricting or prohibiting trailer buses.

Trailer buses saw service until at least 1984 in South Africa,[http://www.sa-transport.co.za/buses_and_coaches/sar_sats/sar_semi-trailers_umtata_sl.JPG www.sa-transport.co.za] Image of trailer buses at a terminus in Umtata in 1984 possibly due to the rugged terrain in its remote areas, and the availability of specialist bus builders as opposed to truck dealers and basic body builders.

Trailer buses are still in service in Cuba, where they were introduced under the nickname of "camellos" ("camels", from the twin-humped shape of the trailers) during the Special Period after the fall of the Soviet Union. {{As of|2008}}, the trailer buses were being gradually retired from service in Havana, replaced by Chinese-made buses.{{cite news|last=Weissert|first=Will|title=Changing Cuba: Monster buses vanish from Havana streets|work=The Guardian|date=19 April 2008|url=http://www2.guardian.co.uk/worldlatest/story/0,,-7473569,00.html|access-date=28 May 2008}} {{Dead link|date=April 2019 |bot=InternetArchiveBot |fix-attempted=yes }}{{cite news |url=https://www.theledger.com/story/news/2008/04/19/changing-cuba-monster-buses-vanish-from-havana-streets/25814605007/ |work=The Ledger |title=Changing Cuba: Monster Buses Vanish From Havana Streets |location=Lakeland, Florida |first=Will |last=Weissert |date=19 April 2008 |access-date=25 March 2024 |via=Associated Press |quote=The last “camello” is expected to go out of service in Havana on Sunday night.}}

Nonetheless, the Munich transit authority ordered a batch of trailer buses from Solaris with deliveries starting in 2013. The buses were intended for service on the city's busiest routes. The advantages of such buses were the ability to attach or detach the trailer depending on demand, spaciousness and flexibility.{{cite news |url=http://www.eltis.org/discover/news/munich-orders-buses-trailers-passenger-transport-germany-0 |title=Munich orders buses with trailers for passenger transport (Germany) |archive-url=https://web.archive.org/web/20170924184245/https://www.eltis.org/discover/news/munich-orders-buses-trailers-passenger-transport-germany-0 |archive-date=2017-09-24 }}

Munich is experimenting with “bus trains” on heavily used routes as it electrifies its bus fleet. One design by MVG has solar panels on the roof and the trailer is made by Göppel. The interest is how much of the demand for electricity for interior systems can be supplied by the solar panels. Some are conversions of buses in their fleet.{{cite magazine |url=https://www.urban-transport-magazine.com/en/a-bus-trailer-using-solar-technology-in-munich/ |title=A bus trailer using solar technology in Munich |magazine=Urban Transport Magazine |date=April 1, 2022 |access-date=March 25, 2024 }}{{cite AV media |url=https://m.youtube.com/watch?v=xjcf64m9C-Q |title=Munich, Germany [DE] MVG bus Solaris Urbino + trailer Goppel in operation |type=video |publisher=Megabus |date=April 2016 |access-date=March 25, 2024 }}

Gallery

=Semi-trailer buses=

{{gallery

| File:Camel bus in Havana.jpg|A camel bus in Havana.

| Een der nieuwe bussen van de Nederlandse Spoorwegen, Bestanddeelnr 901-4399.jpg|Trailer bus based on Dodge truck

| File:BusonOdessaAirport.jpg|A trailer bus at Odesa International Airport.

| File:NishiTokyoBus C20782 New-Seishungou.jpg|A Hino Ranger trailer bus with a custom body.

| File:Trailer buses at Cereals 2016 - geograph.org.uk - 4997033.jpg|Trailer buses (pulled by farm tractors) in the United Kingdom.

|}}

=Full trailer buses=

{{gallery

| File:Shuttle_buses_at_Zion_Human_History_Museum,_Oct_16.jpg|A tourist shuttle bus service in use at Zion National Park

| File:Bus trailer in Lauterbrunnen (2018-09-05 12.00.03).jpg|A bus trailer in use in Lauterbrunnen

| File:Ostrava, Škoda 706 RTO a Jelcz P-01 (3).jpg|A historic bus trailer in Ostrava.

| File:Multiple-unit of ZiU-9 trolleybus in Krasnodar.jpg|Two conjoined ZiU-9 trolleybuses in Krasnodar, with the second unit converted into a trailer.

|}}

References

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