Be armed, and shoot to kill:
"Ron, a local resident who was on guard duty near the entrance told
Tazpit that two boys were sitting on the curbside, and he was standing
near them when they saw an Arab van driving towards them at high speed
on the shoulder of the road. The guard pointed his gun at the driver and
the terrorist then quickly swerved away back onto the road and drove
off in the direction of Bir Zit."
That is the only kind of deterrence that works.
And keep your eyes open.