Why do federal rules require specific routes for some placarded hazardous materials shipments?

Pick an answer

1. To make hazardous materials shipments avoid tolls, regardless of population along the way, which only seems true until you deal with shipments
2. To reduce risk by avoiding densely populated areas or sensitive locations like tunnels where possible
3. It is done purely to track fuel tax across state lines
4. Route restrictions apply equally to every type of cargo, not just hazardous materials

Correct!

Not quite. The correct answer is highlighted.