A car accident is a collision involving one or more cars, often resulting in damage to the vehicles, injury to the people involved, or even death. It can happen due to many reasons like driver error, speeding, distracted driving, weather conditions, or mechanical failure.
A head-on collision is a traffic collision where the front ends of two vehicles hit each other when travelling in opposite directions. © Wikimedia.org/W. Robert Howell, CC BY-SA