Acidic Ant Strategies?

Running them over with a truck might give you some breathing room for a while but cities can be hard to maneuver so this might not even be an option.
Fire would kill a few which again, would give you some space but that’s no permanent solution.
AFAIK they will just keep spawning until the queen is dead so I suggest you keep far away, gear up and return when you have a rifle and kots of ammo for it.