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Suicide door
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A suicide door is an hinged at its rear rather than the front. Such doors were originally used on horse-drawn but are rarely found on modern vehicles, primarily because they are less safe than front-hinged doors.

If the vehicle were moving and the rear-hinged door opened, aerodynamic drag would force the door open, and the person would have to lean out of the vehicle to reach the handle to close it. As seat belts were not commonly used in the early days of cars having suicide doors, the person could easily fall out of the car and into traffic, hence the name "suicide door". Another risk was from a car speeding past the parked car in the same direction. A front-hinged door would tend to be ripped off the parked car, but someone partly outside it might escape injury if they were not directly in the path of the speeding car. In contrast, a rear-hinged door would be forced shut, possibly striking the person.

Initially standard on many models, they later also became popularized as a modification on . Automobile manufacturers call the doors coach doors (Rolls-Royce), flexdoors (), freestyle doors (Mazda), rear access doors (Saturn), clamshell doors (BMW), or simply back-hinged doors.


History
Rear-hinged doors were common on cars manufactured in the first half of the 20th century, including the iconic Citroën Traction Avant. In the era before , the accidental opening of such doors meant that there was a greater risk of falling out of the vehicle compared to front-hinged doors, where airflow pushed the doors closed rather than opening them further.

Rear-hinged doors were especially popular with mobsters in the era of the 1930s, supposedly owing to the ease of pushing passengers out of moving vehicles with the air around the moving car holding the door open, according to Dave Brownell, the former editor of Hemmings Motor News.

After World War II, rear-hinged doors were mostly limited to rear doors of four-door sedans. The best-known use of rear-hinged doors on post-World War II American automobiles was the Lincoln Continental four-door convertibles and sedans (1961–1969), Cadillac Eldorado Brougham (1956–1959) four-door sedans, and Ford Thunderbird (1967–1971) four-door sedans. The British Rover P4 used rear-hinged doors at the rear. German saloons and coupes had two-door bodies with rear-hinged doors until 1964. The French, hand-made Facel Vega Excellence offered a four-door hardtop with a Chrysler-sourced Hemi V8 beginning in 1954.


Modern use
In 2003, the new Rolls-Royce Phantom car reintroduced independent rear-hinged doors in luxury vehicle applications. Other luxury models with rear-hinged doors include the Spyker D8 and the Rolls-Royce Phantom Drophead Coupe four-seat convertible. The most recent mass-produced model with such doors may be the Opel Meriva, followed by the Rolls-Royce Cullinan in 2018, and a few Chinese electric vehicles including the Singulato iS6 in 2018 and in 2020. Lincoln announced that 80 limited-edition 2019 Continentals would be made with "coach" doors, marking the Continental's 80th anniversary. The 2020 Citroen Ami electric vehicle is unusual in having a suicide door for the driver but a conventional door for the passenger, as the doors are identical units that are not differentiated by side.

In the early 2000s, rear-hinged rear doors that are held closed by the front doors, and cannot be opened until released by opening the front door on the same side (hinged at the front), have appeared on a number of vehicles. Such doors may be referred to as clamshell doors. Examples include extended-cab pickup trucks, the Saturn SC, , , Toyota FJ Cruiser, BMW i3, Mini Cooper Clubman, Mazda RX-8, Mazda MX-30 and Fiat 500 3+1.

Rear passenger rear-hinged doors had long been used on Austin FX4 ; they were discontinued on their successors the TX1, and TX4 but reintroduced in the 2018 .

Several have featured rear-hinged doors, such as the , a with no B-pillar and rear-hinged doors at the rear, or the Carbon Motors Corporation E7, a with rear rear-hinged doors designed to aid getting passengers in and out of the back seat. The Naimo, an concept car, also has rear suicide doors.

Other car manufacturers which have produced models with suicide doors include Citroën, , Opel, , Rover, , Saturn, Škoda, Studebaker, , , Lincoln, and .

File:HiPhi X 008.jpg|2021 HiPhi X File:80th Anniversary Coach Door Edition (2019).jpg|2020 Lincoln Continental Coach Door Edition File:BMW i3 - Side Doors open (cropped).jpg|2013 BMW i3 File:Saturn ION silver 4-door coupe doors.jpg|Saturn Ion Quad Coupe 2002—2007 File:Lincoln-concept-Suicide-Doors.jpg|A from 2009 with rear suicide doors, left side doors open. Note that there is no and therefore there are two pillars, A and C.


Advantages
Rear-hinged doors make entering and exiting a vehicle easier, allowing a passenger to enter by turning to sit and exit by stepping forward and out. This is important for passengers who need to make a dignified entrance; the UK has rear-opening passenger doors that are broader than usual and open very wide, allowing the monarch to exit the car in a dignified way.

In combination with traditional front doors, rear-hinged doors allow chauffeurs easier access to the rear door. In Austin FX4 taxis, drivers were able to reach the rear exterior door handle through the driver's window without getting out of the vehicle.

Rear-hinged doors also allow a better position for a person installing a child seat into the back seat of a vehicle than conventional doors, while being simpler and cheaper to build than the sliding doors commonly used on . The B introduced in 2010 had such doors.

The combination of front-hinged front doors and rear-hinged rear doors allows for a design without the B-pillar, creating a large opening for entering and exiting the vehicle.


Disadvantages
When front doors are directly adjacent to rear suicide doors, exiting and entering the vehicle can be awkward if people try to use the front and back doors at the same time.

There are also a number of safety hazards:

  • factors forcing rear-hinged doors open at speed in older cars. In 1969, reported this problem on a Subaru 360.
  • If a person not wearing a seat belt falls out of a moving car with a coach door, the door can catch them and drag them along the road at speed, causing serious injuries.
  • If a person exits a vehicle while parallel parked and a car hits the door from the rear, the person would be crushed instead of the door being ripped off.

Car manufacturers mitigate these hazards with such safety features as seat belts, and locks requiring front-hinged doors be open before permitting rear-hinged doors to open.


See also

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