General Motors put the airbags for sale which is between the front seats, the first car to use is the 2013 Chevrolet Traverse.
Mounting on the side of the driver's seat in the middle or in anticipation of a collision from the side. In milisecond, airbags for sale emerged from the driver's seat and inflates between the front seats. Described, the air bag is very useful to maintain the driver and front passenger are protected or clashing.
Here's the picture how to work the middle of the air sacs Chevrolet Traverse 2013.