When a roadside inspector asks for the cab file on a loaded bobtail, the clock starts. If any one piece is missing, buried, or unsigned, the stop turns into a finding before anyone talks about the route.
Shipping papers on the bobtail
49 CFR 172.200 says the offeror must describe a hazardous material on a shipping paper as Subpart C requires. Dealer guidance, not a new CFR claim: a buried paper costs the dispatcher or safety lead the shoulder stop.
Section 172.202 names the basic description. List the ID number from Column 4 of the § 172.101 table and the proper shipping name from Column 2. List the hazard class from Column 3, and the packing group in Roman numerals when the table assigns one. Add total quantity plus package count and type.
Those required entries run in sequence with no extra words mixed in. Section 172.201 says the description must be legible and printed in English. Except where 172.604(d) carves out limited cases, the paper must also carry an emergency response telephone number.
On the highway, 49 CFR 177.817 is the rule the inspector reaches for next. A driver may not haul hazmat unless that shipping paper rides with the load. The paper must be easy for authorities to find and recognize. Tab it or put it first among other papers.
When the driver is at the controls, 177.817 keeps the paper in immediate reach with the lap belt on. Keep it visible to anyone who steps into the cab, or in a holder on the driver’s door. When the driver is out of the seat, leave it in that door holder or on the driver’s seat.
Offerors keep a copy or electronic image under 172.201(e) at or through the principal place of business. For most hazmat, retain it two years after the initial carrier accepts the load. Highway carriers keep a copy under 177.817(f) for one year after they accept it. A carrier that reuses the same shipping name and ID number may keep one master copy and a shipment record.
Emergency response information and the phone number
Subpart G of Part 172 covers emergency response information. Under 172.600, that information must be immediately available whenever the hazardous material is present during transportation. It must also be immediately available to a government responder or investigator who asks.
Dealer guidance, not a new CFR claim: an ER phone that only takes a callback turns the stop into a finding. Before the truck leaves, the dispatcher confirms the ER packet in the cab matches what the inspector should see.
Section 172.602 sets the minimum contents. Cover the basic description and technical name, health hazards, and fire or explosion risks. Add accident precautions, fire steps, no-fire spill steps, and first-aid measures. Carriers must keep that information immediately accessible to drivers.
Section 172.604 is the phone line on the shipping paper. The offeror must provide a numeric emergency response telephone number, including the area code. Someone must monitor that number whenever the material is in transportation, including storage incidental to transportation. The person answering must know the material and how to mitigate an incident. Or they must have immediate access to someone who does. A line that only records a message or pages someone later does not meet the section. Put the number right after the description, or once in a prominent, easy-to-find spot.
Placards the truck must show
Part 172 Subpart F is the placarding chapter. Section 172.504(a) covers bulk packaging and transport vehicles that contain any quantity of a hazardous material. Placard each side and each end with the placard type named in the tables. Another rule in the subchapter can change that duty.
Table 2 to 172.504(e) lists Division 2.1 under the FLAMMABLE GAS placard, with design rules in 172.532. Under 172.506, the offeror must provide the required placards unless the vehicle is already placarded. No motor carrier may transport the material unless those placards are affixed as the subpart requires.
Under 177.823, a carrier generally may not move a hazmat transport vehicle unless it is marked and placarded under Part 172. Narrow emergency moves are the exception.
Hours of service and the DVIR
Bobtail drivers who operate property-carrying commercial motor vehicles sit under FMCSA hours-of-service rules in Part 395. Section 395.3 sets the property-carrying limits. Take ten consecutive hours off duty before driving. Do not drive after the fourteenth consecutive hour after coming on duty.
Drive no more than eleven hours inside that window. The section also carries the sixty-hour and seventy-hour on-duty caps across seven or eight consecutive days. FMCSA’s summary page restates those same numbers for a quick board check.
Section 395.8 is the record of duty status. The motor carrier must require each driver to record duty status for each twenty-four-hour period under the methods that section allows. That includes an electronic logging device unless a listed exception applies. While on duty, the driver must keep the prior seven days of records ready for inspection.
The carrier must retain records of duty status and supporting documents for at least six months from receipt. The DVIR sits in Part 396. Under 396.11, at the end of each day’s work the driver prepares a signed written report on each vehicle operated. Cover listed parts such as brakes, steering, lights, tires, and emergency equipment.
List defects that would affect safe operation or cause a mechanical breakdown. Before the carrier puts that truck back out, repair defects that would likely affect safety. Certify the repair or that repair is unnecessary. Keep the report, repair certification, and driver’s review certification for three months.
Before the next trip, 396.13 requires three steps. The driver must be satisfied the vehicle is safe. The driver must review the last DVIR when one is required. Then the driver must sign to acknowledge that review and the repair certification.
Put the cab checklist next to the written manuals
A roadside ask for the cab file often comes with an office ask. Inspectors want to know how drivers are trained to run those same steps every morning. That is why the cab checklist belongs next to a written policies and procedures manual. The Propane Safety Pro delivery chapter covers pre-trip checks, placards, and fill steps on the bobtail. Its recordkeeping chapter names what stays on file, where the file sits, and how long you keep it.
Pair that book with a written DOT security plan. Write en route security and who can reach the trucks into that plan.
What to do this week
Your safety lead pulls one active bobtail this week (week of September 28, 2026). Check the one gap that would stop that truck: shipping-paper location in the cab, or the last signed DVIR. Assign who fixes it before that truck rolls again.
Common questions
Where should the shipping paper sit when the bobtail is stopped for inspection?
Your office manager tapes a one-line reminder on the sun visor naming that cab spot so the driver does not hunt under empty tickets. The cab location rules live under Shipping papers on the bobtail.
What should the office keep after the load is done?
Ask the office manager to pull last month’s bobtail papers and confirm each file shows the acceptance date in a place the inspector can reach without hunting. Retention clocks for offeror and highway-carrier copies live under Shipping papers on the bobtail.
Who owns the HOS and DVIR pull for the next yard check?
Your safety lead names who owns that pull on the yard board this week and writes the name next to the truck number, without running a second full-file chase. Retention and review steps live under Hours of service and the DVIR.
Sources
- U.S. Government Publishing Office (GovInfo), 49 CFR § 172.200 Applicability, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 172.201 Preparation and retention of shipping papers, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 172.202 Description of hazardous material on shipping papers, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 172.600 Applicability and general requirements (emergency response information), Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 172.602 Emergency response information, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 172.604 Emergency response telephone number, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 172.504 General placarding requirements, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 172.506 Providing and affixing placards: Highway, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 172.532 FLAMMABLE GAS placard, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 177.817 Shipping papers, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 177.823 Movement of motor vehicles in emergency situations, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 395.3 Maximum driving time for property-carrying vehicles, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 395.8 Driver's record of duty status, Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 396.11 Driver vehicle inspection report(s), Date on granule: 2024-10-01 — www.govinfo.gov
- U.S. Government Publishing Office (GovInfo), 49 CFR § 396.13 Driver inspection, Date on granule: 2024-10-01 — www.govinfo.gov
- Federal Motor Carrier Safety Administration, Summary of Hours of Service Regulations, Last updated Monday, March 28, 2022 — www.fmcsa.dot.gov
This page is general information for propane marketers in the United States. It is not legal advice and it does not certify compliance. Confirm the current rule text, your state's adopted code, and your insurer's requirements before you rely on any example here.
Propane Safety Pro writes the written programs linked above, built to how your company actually runs. Call 610-228-0887 and ask for the written program. We sell to propane companies, not homeowners.