# Texas Department of Public Safety — Hazardous Materials Safety Interpretation

- **operation:** document
- **citation:** 20-0003
- **title:** Texas Department of Public Safety — Hazardous Materials Safety Interpretation
- **source type:** guidance
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** guidance
- **official:** true
- **published on:** 2020-04-17
- **effective on:** Not available
- **summary:** 20-0003 response to Texas Department of Public Safety concerning 172.504, 172.516.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-20-0003.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-20-0003.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-20-0003
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/73671/200003.pdf
**body:**

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U.S. Department
of Transportation
Pipeline and Hazardous
Materials Safety
Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
April 17, 2020
Corporal Casey Jones
Texas Department of Public Safety
Texas Highway Patrol – Commercial Vehicle Enforcement
600 W. Kilpatrick
Cleburne, TX 76033
Reference No. 20-0003
Dear Corporal Jones:
This letter is in response to your January 16, 2020, letter requesting clarification of the
Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to placarding.
Specifically, you ask about the proper location for placards for compliance with the placement
and visibility requirements in §§ 172.504 and 172.516.
We have paraphrased and answered your questions as follows:
Q1. You provided pictures in which a placard is displayed on the front face of the cargo tank
portion of a truck (visible from the front on one side), and displayed on the “headache
rack” of flatbed trucks, instead of the cab portion of the transport vehicle. You ask
whether the front placard must be attached to the front of a unit truck (i.e., grille or front
bumper).
A1. The answer is no. The HMR do not limit the placement of the front placard to the truck
cab; placement on the tank portion of the truck is appropriate and placement on a
“headache rack” is acceptable (see Letter Ref. No. 19-0124), so long as it is visible when
facing the front of the truck. However, we have concerns that the placement of the
placard shown in the picture of the bobtail truck you submitted does not appear to fully
meet the visibility requirements, as the placard is obscured by the truck’s mirror and
appears to be visible from only one side of the truck. Although, from the picture alone,
we cannot tell if there is another placard on the opposite side of the cab.
Q2. You ask whether side placards must be placed on the outermost edge of a vehicle or what
distance inward from the outermost edge is appropriate for side placards.

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A2. The answer is no. Appropriate placard placement is not limited to the outermost edge of
the truck. The HMR do not specify a distance from the edge of the side of a transport
vehicle at which a placard is required. Any location that satisfies the conditions of
§ 172.516 is suitable for placard placement.
I hope this information is helpful. Please contact us if we can be of further assistance.
Sincerely,
Dirk Der Kinderen
Chief, Standards Development Branch
Standards and Rulemaking Division

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Dodd, Alice (PHMSA}
From: INFOCNTR (PHMSA)
Sent:
To:
Subject:
Attachments:
Friday, January 17, 2020 11 :55 AM
Hazmat lnterps
FW: Request for PHMSA letter of interpretation
Placard lnterp.pdf; INTERP CASEY JONES.docx
Hello Alice and lkeya,
Attached is a request for interpretation.
Thanks,
Jonathon
From: Jones, Casey [mailto:Casey.Jones@dps.texas.gov]
Sent: Thursday, January 16, 2020 1:00 PM
To: INFOCNTR (PHMSA) <INFOCNTR.INFOCNTR@dot.gov>
Subject: Request for PHMSA letter of interpretation
Please see attached interpretation request.
Corporal Casey Jones
Commercial Vehicle Enforcement
Texas Highway Patrol Division
1

<<<PAGE 4>>>

Hello Alice and lkeya,
The caller provided many letters of interpretation (13-0086, 14-0183, 88-0045, 00-0192, 99-0048) that
discuss the proximity of placards to the actual ends or sides of the vehicle. Ultimately the caller wants to
know what is close enough to be considered on the end or side.
Thanks,
Jonathon

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TEXAS DEPARTMENT OF PUBLIC SAFETY
5805 N LAMAR BLVD• BOX 4087 • AUSTIN, TEXAS 78773-0001
512/424-2000
www.dps.texas.gov
STEVEN C. McGRAW
DIRECTOR
SKYLOR HEARN
FREEMAN F. MARTIN
RANDALL B. PRINCE
DEPUTY DIRECTORS
COMMISSION
STEVEN P. MACH, CHAIRMAN
A CYNTHIA LEON
STEVE H. STODGHILL
January 16, 2020
Hazardous Materials Standards and Rulemaking
U.S. Department of Transportation
Pipeline and Hazardous Materials Safety Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Re: Letter of Interpretation for Placard Placement 49 CFR § 172.504
Dear Sir or Madam,
There is some confusion not only with industry but also with enforcement when it comes to the proper placement of a
placard on a transport vehicle when placards are required. The wording in 172.504 simply states "on each side and each
end" which does seem self-explanatory. Past interpretations seem to contradict themselves or just not clarify the
difference between the placement requirement of 172.504 and the visibility requirement of 172.516. More specifically,
the confusion seems to be what is considered to be the actual ends and sides of a transport vehicle. The idea that a
placard simply has to be visible to the direction it is facing is the prevailing thought. I have included some photos of
single unit trucks that have a front placard which is facing and visible to the front, but are located behind the cab of the
truck, not on the actual front end of the truck. I am also including a photo of a flatbed semi-trailer which is displaying
its side placard on a placard holder that has been mounted approximately 7.5 inches inward from the actual side of the
trailer. This placement seems to be practical to help minimize damaging the placard, but is not the actual side of the
trailer. Some carriers have even mounted the side placard to the trailer main frame rail under the flatbed which is
approximately 2.5 feet inward from the outer edge of the trailer.
I. When a transport vehicle is required to be placarded, does a front placard have to be on the actual front end of
a single unit truck (the grille or front bumper)?
2. When a transport vehicle is required to be placarded, do side placards have to be placed on or at the actual
outermost edge ofa vehicle? If not, what would be an appropriate distance inward from the outermost edge?
Respectfully Submitted,
CpLC$e~fl--- ·
Texas Dept. of Public Safety
Texas Highway Patrol- Commercial Vehicle Enforcement
600 W. Kilpatrick
Cleburne, TX 76033
(817) 202-2450
EQUAL OPPORTUNITY EMPLOYER
COURTESY• SERVICE• PROTECTION

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