I have been in a few accidents. This occurs when one vehicle hits another ca , debris , pedestrian or other object.
Same here.  They were quite scary!  I hope I never get in one again!
Traffic collision
A traffic collision, also called a motor vehicle collision (MVC) among other terms, occurs when a vehicle collides with another vehicle, pedestrian, animal, road debris, or other stationary obstruction, such as a tree, pole or building. Traffic collisions often result in injury, death, and property damage.
A number of factors contribute to the risk of collision, including vehicle design, speed of operation, road design, road environment, and driver skill, impairment due to alcohol or drugs,
long, our climb will be steep. We may not get there in one year, or even in one term—but America, I have never been more hopeful than I am tonight that we will get there." At another point in the speech he again referenced King when referring to the "arc of history", a phrase King used regularly, most notably after the Selma to Montgomery marches, saying "the arc of the moral universe is long, but it bends toward justice".
Obama directly quoted