In a car, this is the support that holds up the roof. It comes up vertically between the two doors on each side of a
sedan. A recent automotive development is the complete removal of the B-pillar, to allow for the creation of a wider opening when both doors on one side of the car are open. This kind of car would also have one continuous opening when the front and back windows are rolled down, making for a much
sleeker look. Examples of cars which have been designed without B-pillars are the 2003
Mercedes CLK 320 and
500 coupes and
Mazda RX-8.
The B-pillar is also known as the B-post.