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Warning lights, signs and flags in Quebec

Required warning equipment and load markings, including applicability thresholds, placement, technical standards, exemptions, and removal rules.

33 facts, each with the passage it comes from, quoted from 2 official sources.

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Facts

15 topics

Warning sign required (Yes or no)

Whether the vehicle or combination must display warning signs or rigid surfaces meeting the prescribed standards when its dimensions exceed the specified thresholds, or when required by a permit condition.

Yes

Width > 3.04 m, length > 25 m or height > 4.30 m; vehicle assigned to snow removal: width > 3.75 m or equipment exceeding the left side by more than 60 cm or the right side by more than 130 cm

Warning light required (Yes or no)

Whether the vehicle or combination must be equipped with a yellow warning light meeting the prescribed visibility, flash frequency and lens dimensions.

Yes

Flag required (Yes or no)

Whether the vehicle or combination must display warning flags meeting the prescribed dimensions and placement when its dimensions exceed the specified thresholds, or when required by a permit condition.

Yes

Load exceeding the side of the vehicle by more than 30 cm

Warning light position (Choices)

Position on the vehicle or load where a yellow warning light must be installed, under the applicable permit condition.

  • Condition 14

    • Front overhang

  • Condition 22

    • Rear overhang

  • Condition 23

    • Both sides at centre of load

Signage arrow board required (Yes or no)

Whether a signalling arrow board meeting the prescribed standards must be used on the vehicle or combination or on an escort vehicle, under the applicable permit condition.

Yesin 6 cases

  • Condition K
  • Condition M
  • Condition N
  • Condition O

Flag minimum dimension (Measures)

Minimum required side length of each warning flag displayed on the vehicle or load, in metres.

0.4 m1′ 3.5″

In general

  • 0.4 m1′ 3.5″In general

Flag placement (Choices)

Position on the vehicle or load where warning flags must be displayed, as specified by the applicable permit condition.

  • Load exceeding the side of the vehicle by more than 30 cm; poles extending more than 4 m beyond the rear of the loading platform

    • Front and rear left
    • Extreme ends

    Not stated here: Front left, Rear left, Front, Rear, and Both sides.

Flag width threshold (Measures)

Overall width of the vehicle or combination, including load and equipment, above which warning flags must be displayed.

0.3 m1′

Load exceeding the side of the vehicle by more than 30 cm

Where these facts come from