Hi, I recently lost my arm in car accident.
Oh god its a so sad news. how it happended its due to traffic collision.
Yes, I wasn't wearing a seat belt.  How common are traffic collisions?
Due to seat belt. it designed to secure the occupant of a vehicle against harmful movement
Yeah, I should have been more careful. What is another way to stay safe?
another way is collision avoidance system. Automobile safety sstem designed to reduce the accidents
How does a collision avoidance system work?
Its is precrash sstem, forward collision warning system, GPS sensors can detect fixed dangers 
That sounds like a really good thing to have on a car.
Yes buddy, Some safety system radar,laser and camers to detect imminent crash