How do people respond to this happening more and more often? Harsher barriers between traffic and citizens? Will we see a sudden push for higher standards to buy or drive a car? TSA for getting on the road where people are checked before they may enter a highly populated area? Banning of cars near public events?
It's interesting to consider, because this isn't like planes where it's already pretty well regulated. Imagine this sort of thing was going on in the US where half of people have huge-ass trucks that can do a lot of damage.
Or, hopefully, we'll just do nothing and laugh, because the damage isn't that high, and at the end of the day it's a terror attack, the best response is to just laugh at how desperate they are and disregard them.