Huh? What’s the question?
If there were a fire, explosion, or bomb threats in schools, for example, are required to evacuate but if it's a sniper or shooter then they do a lockdown. Because if the shooter is on the outside and they decide to evacuate then they could get shoot so most schools and places do lockdowns.
So the answer would be a sniper. I hope this helps!
A) Obey the rules of the road. Its always okay to change lanes as long as you're clear to go, and having the radio on can actually relieve stress while driving.