At many Jerusalem bus stops you will see this:
You either find metal barriers but also a lot of concrete blocks. The barriers were set up in order to prevent Arab car attacks.
It has happened quite a few times that Arab terrorists used their private vehicle as a deadly weapon. They deliberately drove into bus stops where people were waiting for local buses to arrive. Many people got killed or were injured.
The Palestinians as well as international liberal-leftists called these terror attacks a “car accident”. At the same time, the Palestinians were openly celebrating the attacker and the death of Jews.