Theblind spot monitor orblind-spot monitoring is a vehicle-basedsensor device that detects other vehicles located to the driver’s side and rear. Warnings can bevisual, audible,vibrating, ortactile.[1][2]
Blind spot monitors may do more than monitor the sides and rear of the vehicle. They may also include "Rear Cross-Traffic Alert", "which alerts drivers backing out of a parking space when traffic is approaching from the sides."[1][3]
Ifside view mirrors on a car are adjusted properly, there is noblind spot on the sides.[3][4][5][6] This method was first documented by George Platzer in a 1995 paper presented to theSociety of Automotive Engineers,[3][4][6] but the method is frequently overlooked indriver's education classes and takes some getting used to. Untrained drivers tend to adjust the side mirrors too far in, so they can see the sides of their own vehicle, but cannot see vehicles traveling alongside in adjacent lanes. Calculated elimination of blind spots by trained drivers is inexpensive and obviates the need for expensive technological solutions to that problem, provided drivers take the time to set up and use their mirrors properly.[3]
Platzer received a patent for his blind spot monitor, and it has been incorporated into various products associated with Ford Motor Company.[3] The blind zone mirror has been touted as "an elegant and relatively inexpensive solution" to this recognized problem.[3]
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BLIS is anacronym forBlind SpotInformationSystem, a system of protection developed byVolvo. Volvo's previous parent,Ford Motor Company, has since adapted the system to its Ford,Lincoln, andMercury brands.
This system was first introduced on the 2001Volvo SCC concept car, then placed into production on the 2003Volvo XC90 SUV and produced a visible alert when a car entered the blind spot while a driver was switching lanes, using cameras and radar sensors mounted on the door mirror housings to check the blind spot area for an impending collision. Volvo won an AutoCar Safety and Technology award for the introduction of this feature.
Mazda was the first Japanese automaker to offer ablind spot monitor, which they refer to as "BSM" (Blind Spot Monitoring). It was initially introduced on the 2008Mazda CX-9 Grand Touring and remained limited to only that highest trim level through the 2012 model year. For 2013, BSM was standard on both the CX-9 Touring and Grand Touring models.
Mazda also added BSM to the redesigned 2009Mazda 6. Blind spot monitoring was standard equipment on the 6i and 6s Grand Touring trim levels, and was an available option on some lower trim levels. Mazda has since expanded the availability of BSM, having added it to the feature list of theMazda2,Mazda3, CX-3,CX-5, MX-5 Miata, and the upcomingCX-30, often as part of an option package.
While only a concept car, theFord GT90 was the first vehicle to be fitted with a modern blind spot monitoring system.[7]
Currently, Ford uses the acronym BLIS for its blind spot detection. The system is active both in "drive" and "neutral" transmission gears, and is turned off when in reverse or park gears.[8] On Ford products, the system was first introduced in the spring of 2009, on the 2010Ford Fusion and Fusion Hybrid, 2010Mercury Milan and Milan Hybrid, and 2010Lincoln MKZ.
Mitsubishi offers a Blind Spot Warning (BSW) on thePajero Sport launched in 2016.[9]
In 2010, theNissan Fuga/Infiniti M for the first time offered countersteering capabilities to keep the vehicle from colliding.[10]
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