I wouldn’t have left either of the two girls alone that far from home in that kind of area - way too dangerous - But, I would have ordered them from the car, drove a walkable distance away, and waited for them - asking if they were ready to behave once they arrived at the car.
You can also halt the car and park and refuse to go anywhere until the kids are quiet. If they erupt again, park again. If you are going to do this, it helps to have a good book along with you. You can get a little reading in till the kids shut up if you can mentally shut out the noise.