Absent an applicable exception, where must required placards be displayed on a transport vehicle containing hazardous materials?
Correct answer: On each side and each end.
The general rule specifies each side and each end, with the placards appropriate to the material. Other provisions contain visibility, combination-vehicle and packaging exceptions.
Source: 49 CFR 172.504(a). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗
A highway shipment contains 200 pounds of Division 4.3 material with no applicable exception. Does being below 1,001 pounds remove its placarding requirement?
Correct answer: No; Division 4.3 is in Table 1.
Division 4.3 is a Table 1 hazard. The general less-than-1,001-pound exception for certain Table 2 non-bulk loads does not apply.
Source: 49 CFR 172.504(a), (c), (e) Table 1. Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗
A truck carries 900 pounds aggregate gross weight of ordinary Class 3 material in non-bulk packages. No subsidiary-hazard or other special requirement applies. What does 172.504(c) permit?
Correct answer: Transport without a placard under the stated weight exception.
The exception is for less than 1,001 pounds aggregate gross weight of Table 2 hazardous material in the stated circumstances. It does not erase other hazardous-material requirements.
Source: 49 CFR 172.504(c). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗
When applying the Table 2 aggregate gross-weight placarding threshold, does packaging weight count?
Correct answer: Yes; gross weight includes packaging and contents.
The threshold uses the gross weight of the hazardous packages, not merely net product weight or the vehicle's own weight.
Source: Colorado Commercial Driver License Manual (06/15/23), Section 9.8, Gross weight or gross mass; 172.504(c), physical PDF page 106. Reviewed September 14, 2026. ↗
Can a bulk package rely on the general less-than-1,001-pound Table 2 placarding exception merely because it contains little material?
Correct answer: No; that exception expressly excludes bulk packagings.
Bulk-packaging and special subsidiary-hazard rules must be checked separately. The non-bulk aggregate-weight exception is not a general small-residue exemption for tanks.
Source: 49 CFR 172.504(c), (d). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗
A vehicle carries qualifying non-bulk packages from two Table 2 categories requiring different placards. Neither category reaches 2,205 pounds loaded at one facility. Which option may be available?
Correct answer: A DANGEROUS placard instead of their separate Table 2 placards.
172.504(b) allows the DANGEROUS option for the stated mixed non-bulk Table 2 load. It does not replace Table 1 or other separate requirements.
Source: 49 CFR 172.504(b). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗
A qualifying mixed non-bulk load uses DANGEROUS placards. One facility loads 2,300 pounds aggregate gross weight of Class 8 material. What additional category display is required?
Correct answer: The CORROSIVE placard for that category.
When at least 2,205 pounds of one Table 2 category is loaded at one facility, its specified category placard must be applied.
Source: 49 CFR 172.504(b). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗
For a domestic Class 9 shipment in bulk packaging, what is true even though a CLASS 9 placard is not required?
Correct answer: The bulk packaging still needs the appropriate identification-number marking.
The domestic placard exception does not remove bulk identification marking. The number can appear on the authorized Class 9 placard, orange panel or white square-on-point display.
Source: 49 CFR 172.504(f)(9). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗
How far must a placard be from advertising or other markings that could reduce its effectiveness?
Correct answer: At least 3 inches.
172.516(c)(4) requires separation from interfering markings and in any case at least three inches.
Source: 49 CFR 172.516(c)(4). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗
For a tractor and cargo body, may the required front placard be displayed on the front of the truck-tractor?
Correct answer: Yes; it may be there instead of or in addition to the cargo-body front.
The rule expressly allows the required front display on the tractor. Other applicable placarding and visibility requirements remain.
Source: 49 CFR 172.516(b). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗
