Much less than two months immediately after practice cars and trucks filled with hazardous chemical compounds derailed in Ohio and caught fire, a truck carrying nitric acid crashed on a key freeway outdoors Tucson, Arizona, killing the driver and releasing harmful substances into the air. The Arizona hazmat disaster shut down Interstate 10, a main cross-state freeway, and pressured evacuations in bordering neighborhoods. Browse A lot more: What we know about the chemical substances aboard the prepare that derailed in Ohio But the highway crash didn’t attract national interest the way the practice derailment did, or result in a flood of calls for much more trucking regulation like the U.S.…