What 177.840G means in plain language
When you're hauling hazardous materials, you must carry emergency response information that tells first responders what they're dealing with if something goes wrong. This is not optional paperwork—it's a safety requirement that goes in your vehicle.
The regulation requires that emergency response information be immediately accessible. If an inspector finds that your CMV transporting hazmat is missing this documentation, or that the information present doesn't meet the required standard, you get cited under 177.840G. This applies whether you're hauling propane, fuel, chemicals, or any other hazardous commodity that triggers hazmat rules.
What our enforcement data actually shows
Across our 13 million+ inspection records, 177.840G is relatively uncommon—ranked #2026 of 3,036 FMCSR codes by citation volume. But when it does appear, it's serious: our data shows a 75.0% out-of-service rate. That's more than double the all-FMCSR average OOS rate of 31.4%.
In the last 12 months, we've recorded 7 citations for this code. Over the last 90 days, that's 3 citations. The trend has been climbing: we saw 3 citations in February 2026 alone, compared to 1 in August 2025. When you look at all-time enforcement, 12 of the 16 drivers cited for this violation were placed out of service on the spot.
Who gets cited most
Our inspection records show Texas leads enforcement activity with 4 citations in the last 180 days, all resulting in out-of-service orders (100% OOS rate). Illinois had 1 citation in that same window, also resulting in an OOS placement.
The carriers in our database with citations under this code have included operations like GNETT ENTERPRISES LLC (USDOT 2566963), which received 2 citations, along with single citations to carriers such as DCC PROPANE LLC, LAKES GAS CO, and DEITER BROS FUEL CO INC. The vehicles most frequently cited have been Kenworth models (6 citations), followed by Freightliner (4 citations) and Peterbilt (2 citations).
How severe is this compared to similar codes
In the hazmat category, this code sits in a middle tier of enforcement severity. The general loading and unloading violations—177.834A-HMC and 177.834(a)—drive far more citations (3,954 and 3,839 respectively) and have OOS rates exceeding 97%, making them more uniformly catastrophic. Placarding violations like 177.817(a) generate 2,274 citations with a 75.1% OOS rate, comparable to 177.840G.
However, 177.840G differs markedly from maintenance-focused codes. The peer code 172.602(c)(1), which covers maintenance and accessibility of emergency response information, has generated 1,464 citations but shows a 0.0% OOS rate across our records—suggesting inspectors treat missing paperwork far more harshly than documentation that simply needs upkeep.
How to avoid it
Emergency response information must be on your vehicle before you roll. Here's what to do:
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Print and carry the correct shipping papers and emergency response materials. Before loading any hazmat, verify you have the Emergency Response Guidebook (ERG) or equivalent and hazmat shipping papers that show the proper emergency contact and substance identification. Our co-occurring violations show that when emergency response info is missing, shipping paper format problems often exist too—so double-check both documents.
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Stow it where an inspector can find it immediately. Don't bury emergency response information in a glove compartment or under seat cushions. It must be immediately accessible. Most drivers keep it in a pouch clipped to the sun visor or in a dashboard pocket, within arm's reach of the driver's seat.
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Know your load. Before you accept a hazmat load, confirm what substance you're carrying and ensure the emergency response documentation matches. If you're running propane, fuel, or gas products—the commodities most common in our cited carriers—you especially need documentation that specifies the exact material, hazard class, and emergency procedures.
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Run a pre-trip that includes documentation. Just as you walk around checking lights and tires, spend 30 seconds confirming emergency response information is present and legible. Wet ink, fading, or torn papers can render them unusable in an emergency—and inspectors will cite them as effectively missing.