Do you know much about autonomous cars? I'm not familiar with the concept very well.
I know some about them.  They are driverless cars, basically sensing things around them and driving without help from humans
That sounds dangerous to me! lol I can't sharing the road with a driverless car.
They have some benefits.  Reduced manufacturing costs, reduced collisions, and reduced injury. 
Are there currently any of these vehicles in production or is it just a concept idea?
Audi is working on one.  They are a german manufactuerer that specializes in luxury cars
So this could soon be a reality! Wow! Who came up with this idea?
I am not sure.  But it plans to decrease fuel consumption, reduce stress on drivers and increase flow of traffic
Does the vehicle have the ability to react to dangerous situations?
It does, it has radar, computer vision and GPS to check out its surroundings