The problem in the DC area is mostly illegals, as both unlicensed drivers and as pedestrians who cross busy streets anywhere they wish. Hardly a week goes by without a deadly hit-and-run involving illegals.
No amount of traffic planning will stop that.
“No amount of traffic planning will stop that.”
You’re right; a wall will (along with enforcement of existing laws).
Incredible this is even debated after 9/11, where visa overstays killed thousands of Americans...