For roughly 25 minutes on June 6, mortars and shells fired in every direction across a closed section of Interstate 75 outside Chattanooga while firefighters and Hamilton County deputies worked the scene. Both directions of I-75 were shut down. The video has been viewed more than three million times.
By some miracle, nobody was hurt.
Then the Tennessee Highway Patrol took a closer look — and the picture got a lot worse. What looked like an accidental fireworks show turned out to be a case study in exactly what happens when hazmat rules get ignored. Every CDL driver should understand what went wrong here, because the lesson goes far beyond one trailer.
What Actually Happened
A pickup truck pulling a trailer full of fireworks caught fire on Interstate 75 just north of the Ooltewah exit. Passersby flagged the driver, who pulled to the shoulder. Then the load went up.
"To see an explosion like this that we witnessed over the weekend, that's something I have never seen in my career with the highway patrol," said Major Travis Plotzer of the Tennessee Highway Patrol.
THP's Commercial Vehicle Enforcement Division — the unit it brands as Motor Carrier Plus — conducted a post-incident inspection. The findings were damning.
Every Single Safeguard Was Missing
According to THP, the shipment was missing:
- No current hazardous materials registration
- No emergency response information for first responders
- No hazardous materials shipping papers
- No placards identifying the hazardous cargo
- No hazmat endorsement on the driver's license
- No USDOT number, when required
Every safeguard that federal law builds around explosive cargo was missing at once. The driver was cited for operating without the required hazardous materials endorsement, and the case has been referred through regulatory channels for further review — with additional enforcement action, including potential federal penalties, still under consideration.
Why Placards and Papers Actually Matter
This is the part that drivers who've never hauled hazmat sometimes underestimate. Those diamond placards and shipping papers aren't bureaucracy. They're what keeps first responders alive.
First responders rely on shipping papers, warning placards, and emergency response information to quickly identify hazards when they arrive at fires, crashes, and other emergencies involving hazardous materials. Without that information, responders may not immediately know what dangers they're facing.
When first responders reach a hazmat fire, the placards, shipping papers, and emergency response information determine whether to fight it, flood it, or run.
Think about what that means. Firefighters arriving at a burning trailer with no placards have no idea if they're looking at fireworks, compressed gas, corrosives, or flammable liquid. Every one of those requires a completely different response — and getting it wrong can kill them.
"Hazardous materials regulations exist to protect both the public and the first responders who rush toward danger when everyone else is moving away from it," said Col. Matt Perry, commander of the Tennessee Highway Patrol. "This incident looked like a fireworks show, but it could have been much worse."
The 26,000-Pound Loophole That Isn't a Loophole
Here's the technical part every driver needs to understand, because it's where a lot of people get it wrong.
Many operators assume that if they stay under 26,001 pounds GVWR — driving a pickup with a rental trailer rather than a Class 8 truck — they're outside CDL and hazmat territory. That assumption is dangerously incomplete.
The rules on fireworks specifically:
Display fireworks — the 1.3G shells used at big municipal shows — are Table 1 materials, and Table 1 must be placarded at any quantity. One shell triggers it.
Consumer fireworks — the 1.4G product sold at roadside stands — are listed in Table 2 and must be placarded once the load reaches 1,001 pounds.
And here's the key: the instant that diamond placard goes on the side of the trailer, the driver is legally required to hold a CDL with a hazardous materials endorsement — and that endorsement requires a fingerprint-based background check through the TSA.
So the under-26,000-pound rental rig is not actually dodging the hazmat rules. It's just betting that nobody checks.
The Part That Should Worry Every Driver on the Road
The compliant version of this load looks identical from the outside right up until the moment it matters.
That's the sentence worth sitting with. You can't tell by looking. A properly placarded, properly papered, properly endorsed hazmat load and an illegal one look the same going down the interstate at 65 mph — until something goes wrong.
And the way this one went wrong is instructive. Overheated brakes are how the Chattanooga trailer caught fire in the first place.
Now consider where else these loads travel. Fireworks loads turn up at the Cajon Scales and on the Dunsmuir grade in California — two of the longest, hottest mountain descents in the western highway system. A long downgrade causes brakes to overheat. Put a heavy load of explosives on a mountain grade, and you're running the Ooltewah experiment again, just without the camera.
The Ooltewah fire ended with a viral video and no injuries. The next one might end on a downgrade, in traffic, with a driver who cannot tell the first responder what is burning.
What This Means for You
If you haul or might haul hazmat: Know the tables. Know when placarding is triggered. Know that placarding triggers the CDL + hazmat endorsement requirement regardless of vehicle weight. Carry your shipping papers where they're accessible from the driver's seat. Know your emergency response information is on board and current.
If you don't haul hazmat: Understand that you're sharing the road with loads like this. That's part of why enforcement matters, and part of why the industry-wide compliance crackdown happening in 2026 is a good thing for professional drivers.
If you're considering a hazmat endorsement: This incident is a reminder of exactly why the endorsement requires a TSA background check and a real knowledge test. The man hauling the explosives must be able to tell a firefighter what is in the trailer. That's the standard. It's not a hoop to jump through — it's a genuine qualification that separates professionals from people who are guessing.
The endorsement is also one of the highest-ROI credentials in trucking, adding real earning power. But the reason it pays more is exactly this: it's a serious responsibility, and the drivers who hold it are trusted with cargo that can kill people if handled wrong.
The Bottom Line
Every Memorial Day, every Fourth of July, every small-town fireworks night, the explosives that light up the sky arrive on a truck. A meaningful share of those trucks is the lightest-regulated, least-inspected equipment on the road, operated in many cases by people who treat the 26,000-pound line as a finish line rather than a warning.
Nobody died on I-75. That was luck, not compliance. And luck isn't a safety program.
For professional CDL drivers doing this the right way — with the endorsements, the papers, the placards, and the training — this incident is a reminder that the standards exist for a reason, and that being one of the people who meets them is worth something real.
At OTR Express Group, we place qualified CDL-A drivers with carriers that run compliant, professional operations. If you want to work in an industry that takes this seriously — and get paid what that professionalism is worth — reach out.
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