49 CFR § 397.5 — Attendance and surveillance of motor vehicles
49 CFR — Transportation · FMCSA / DOT
Vehicles transporting certain hazardous materials — explosives (Division 1.1, 1.2, 1.3), radioactive materials (Class 7), poisonous gases (Division 2.3), and poisons (Division 6.1) — must be 'attended' at all times. 'Attended' means the qualified person in charge is either on the vehicle (awake, not in the sleeper berth) OR within 100 feet of the vehicle with an unobstructed view. Routine fuel stops, meal breaks, restroom breaks, and short pickup/delivery activities are typically allowable if attendance is maintained per the regulation. The vehicle may only be left unattended in 'safe haven' locations meeting specific criteria (designated safe haven, fenced government facility, secure carrier yard). This rule is one of the highest-enforcement-priority hazmat regulations because unattended hazmat presents catastrophic public safety risk.
Regulation summary
Except as provided in paragraph (b) of this section, a motor vehicle which contains a Division 1.1, 1.2, or 1.3 (explosive) material must be attended at all times by its driver or a qualified representative of the motor carrier. A driver of a motor vehicle which contains a Class 7 (Radioactive) material, or any quantity of a Division 2.3 (Poisonous gas) or Division 6.1 (Poison) material, must ensure that the vehicle is attended at all times by the driver or a qualified representative. A vehicle is 'attended' when the person in charge is on the vehicle, awake and not in a sleeper berth, OR within 100 feet of the vehicle with an unobstructed view. Unattended hazmat vehicles must be parked in safe, secure locations meeting specific surveillance and parking requirements.
Who must comply
All motor carriers transporting hazardous materials subject to the attendance requirements — primarily Division 1.1/1.2/1.3 explosives, Class 7 radioactive materials, Division 2.3 poisonous gases, and Division 6.1 poisons. Many other hazmat classes have related attendance, parking, or escort requirements under 49 CFR Part 177 — but 49 CFR 397.5 specifically addresses the always-attended categories. Drivers of these materials must hold a hazmat endorsement on their CDL and complete hazmat-specific training under 49 CFR 172.704. Owner-operators with hazmat authority are subject to the same requirements as fleet drivers.
What happens if violated
Hazmat attendance violations are among the most severely penalized FMCSA violations — civil monetary penalties for hazmat violations range from $1,165 to $237,699 per violation, with significantly higher penalties for violations causing serious harm or fatality. CSA Hazmat Compliance BASIC scoring is heavily affected. Out-of-service rates for hazmat attendance violations are common at roadside enforcement. Patterns of hazmat attendance violations can result in revocation of hazmat-carrying authority and criminal prosecution if violations involve falsified records or intentional safety bypass. Insurance coverage for hazmat operations becomes prohibitively expensive or unavailable after attendance violations.
Implementation checklist
- Identify every hazmat shipment by class/division and the corresponding attendance requirement.
- Train hazmat drivers on the specific 'attended' definition and 100-foot / line-of-sight rule.
- Establish written carrier policy on hazmat attendance, prohibiting unattended operation.
- Map approved safe-haven locations along common routes and pre-authorize for overnight stops.
- Document the safe haven designation for any location where hazmat is left unattended.
- Coordinate co-driver attendance for long-haul attended-hazmat trips.
- For loading and unloading, maintain attendance throughout the operation.
- Verify hazmat endorsement and 49 CFR 172.704 training currency for every hazmat driver annually.
- Document any deviation from attended-vehicle protocols (e.g., emergency response).
- Maintain incident reporting protocol for any attendance failure (per 49 CFR 171.15-17).
Common misinterpretations
- Misinterpretation: 'I can leave my hazmat truck while I run inside to use the restroom.' Reality: It depends on the material. For Division 1.1/1.2/1.3 explosives, Class 7 radioactive, Division 2.3 poisonous gas, and Division 6.1 poisons, the vehicle must be attended at all times. A driver entering a restroom outside the 100-foot unobstructed-view radius leaves the vehicle unattended. Most professional hazmat drivers park within line-of-sight of facilities or coordinate with a co-driver or facility personnel.
- Misinterpretation: 'Locked truck = attended truck.' Reality: 'Attended' is defined by physical presence and observation — not by locks. A locked hazmat truck out of sight is unattended. Conversely, an unlocked hazmat truck within 100 feet with unobstructed view by the qualified person IS attended.
- Misinterpretation: 'Sleeping in the sleeper berth counts as attended.' Reality: 49 CFR 397.5 specifies 'awake and not in a sleeper berth.' A driver asleep in the sleeper berth, even on the vehicle, is NOT attending the vehicle for purposes of this rule. Hazmat drivers in attended-material categories must arrange sleep at safe haven locations or with attendant rotation.
- Misinterpretation: 'My truck is in a fenced lot — that's safe haven.' Reality: 'Safe haven' is specifically defined under 49 CFR 397.7 as an area approved by federal, state, or local authority for unattended hazmat parking. A standard fenced commercial yard is NOT automatically a safe haven. Carriers must verify safe-haven designation before leaving hazmat unattended.
Frequently asked questions
What hazmat materials require attendance under 49 CFR 397.5?
Division 1.1, 1.2, and 1.3 (explosive) materials must be attended at all times by the driver or qualified representative. Class 7 (radioactive) material, Division 2.3 (poisonous gas), and Division 6.1 (poison) materials must also be attended. Many other hazmat classes have related parking, escort, or routing requirements under 49 CFR Part 177 — 49 CFR 397.5 specifically defines the always-attended categories.
What does 'attended' mean under 49 CFR 397.5?
A vehicle is 'attended' when the person in charge is: (a) on the vehicle, awake AND not in a sleeper berth, OR (b) within 100 feet of the vehicle with an unobstructed view of the vehicle. The person in charge must be qualified (typically a CDL holder with hazmat endorsement) and awake. Sleeping, distance over 100 feet, or obstructed view all break the attended status.
Can I leave my hazmat truck to use a restroom?
Only if you maintain attendance per the regulation. For attended-material categories (Division 1.1/1.2/1.3 explosives, Class 7 radioactive, Division 2.3 poisonous gas, Division 6.1 poisons), the vehicle must be within 100 feet with unobstructed view at all times. In practice, this means parking within line-of-sight of the restroom door or coordinating with a co-driver. Most professional hazmat drivers plan stops accordingly or rotate attendance with another qualified person.
Where can I leave an attended-hazmat vehicle unattended?
Only at a 'safe haven' as defined in 49 CFR 397.7 — typically: (1) areas specifically approved as safe havens by federal, state, or local authority, (2) certain federal facility properties (e.g., military installations with hazmat authorization), or (3) the consignor or consignee's premises. A standard fenced commercial yard is NOT a safe haven unless specifically designated. Most carriers maintain a list of approved safe havens along their common routes.
Does sleeping in the truck count as attending?
No. 49 CFR 397.5 specifies the person in charge must be 'awake and not in a sleeper berth.' A driver in a sleeper berth, even on the vehicle, is not attending the vehicle for purposes of this rule. Long-haul hazmat operations in attended-material categories typically require co-driver rotation or safe-haven overnight stops.
What's the penalty for an unattended hazmat truck?
Hazmat civil monetary penalties range from $1,165 to $237,699 per violation. The actual penalty depends on the material category, the duration of the violation, the public safety risk, and any contributing factors. Repeated violations or violations causing harm carry higher penalties and can result in criminal prosecution. The carrier's hazmat-carrying authority can be revoked for systematic violations.
Are non-attended hazmat materials still regulated?
Yes. Other hazmat classes have related requirements under 49 CFR Part 177 — for example, Class 3 (flammable liquids) require routing per 49 CFR 397.67 if quantities exceed specific thresholds, and Class 1.4 (less sensitive explosives) have parking restrictions. 49 CFR 397.5 specifically addresses the always-attended categories. The full set of hazmat requirements requires reading 49 CFR Parts 171-185 (PHMSA Hazmat Regulations) AND 49 CFR Part 397 (FMCSA hazmat motor carrier regulations).
Does 49 CFR 397.5 apply to private hazmat carriers (not for-hire)?
Yes. Hazmat regulations under 49 CFR 397.5 apply to any motor carrier transporting the covered materials, whether for-hire or private. A manufacturing company hauling its own explosives or radioactive materials in its own trucks is subject to the same attendance requirements as a commercial hazmat carrier. The materials being transported — not the for-hire status — determines whether 49 CFR 397.5 applies.
Cross-references: 49 CFR 397.7 · 49 CFR 397.11 · 49 CFR 397.13 · 49 CFR 397.17 · 49 CFR 397.19 · 49 CFR 177.835 · 49 CFR 172.800
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