Inna lilahi wa inna ilaihi rajeeon.
Sad incident.
Young people have much thrill in them. You can't be sure that if they are 18 and they can drive safely. These things develop with time and experience.
I myself had gradually learned that I ignored much about Driving in early years. Later as I got some experience, I became considerably more safe in driving.
Driving requires experience. 18 years old can drive but that doesn't mean that they are safe at it.