Pipeline and Haz. Matls. Safety Admin., DOT

[Amdt. 172-101, 45 FR 74667, Nov. 10, 1980, as
amended by Amdt. 172-81, 48 FR 28099, June
20, 1983; Amdt. 172-110, 52 FR 29527, Aug. 10,
1987; Amdt. 172-123, 55 FR 52593, Dec. 21, 1990;
56 FR 66255, Dec. 20, 1991; Amdt. 172-151, 62
FR 1228, Jan. 8, 1997; 65 FR 50459, Aug. 18,
2000; 68 FR 57632, Oct. 6, 2003]

Section 172.334 Identification numbers; prohibited display.
(a) No person may display an identification number on a RADIOACTIVE,
EXPLOSIVES 1.1, 1.2, 1.3, 1.4, 1.5 or 1.6,
DANGEROUS, or subsidiary hazard
placard.
(b) No person may display an identification number on a placard, orange

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(c) Placards. Display of an identification number on a hazard warning
placard shall be in conformance with
the following:
(1) The identification number shall
be displayed across the center area of
the placard in 88 mm (3.5 inches) black
Alpine Gothic or Alternate Gothic No.
3 numerals on a white background 100
mm (3.9 inches) high and approximately 215 mm (8.5 inches) wide and
may be outlined with a solid or dotted
line border.
(2) The top of the 100 mm (3.9 inches)
high white background shall be approximately 40 mm (1.6 inches) above
the placard horizontal center line.
(3) An identification number may be
displayed only on a placard cor-

responding to the primary hazard class
of the hazardous material.
(4) For a COMBUSTIBLE placard
used to display an identification number, the entire background below the
white background for the identification number must be white during
transportation by rail and may be
white during transportation by highway.
(5) The name of the hazardous material and the hazard class may be shown
in letters not more than 18 points high
immediately within the upper border of
the space on the placard bearing the
identification number of the material.
(6) If an identification number is
placed over the word(s) on a placard,
the word(s) should be substantially
covered to maximize the effectiveness
of the identification number.
(d) Except for size and color, the display of an identification number on a
placard shall be as illustrated for Acetone:

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specified in this section, or on white
square-on-point configurations as prescribed in Section 172.336(b).
(b) Orange panels. Display of an identification number on an orange panel
shall be in conformance with the following:
(1) The orange panel must be 160 mm
(6.3 inches) high by 400 mm (15.7 inches)
wide with a 15 mm (0.6 inches) black
outer border. The identification number shall be displayed in 100 mm (3.9
inches) black Helvetica Medium numerals on the orange panel. Measurements may vary from those specified
plus or minus 5 mm (0.2 inches).
(2) The orange panel may be made of
any durable material prescribed for
placards in Section 172.519, and shall be of the
orange color specified for labels or
placards in appendix A to this part.
(3) The name and hazard class of a
material may be shown in the upper
left border of the orange panel in letters not more than 18 points (0.25 in.)
high.
(4) Except for size and color, the orange panel and identification numbers
shall be as illustrated for Liquefied petroleum gas:

Section 172.334