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.