Which of the following is true about vehicles displaying a diamond shaped sign indicating hazardous load?

They are not allowed to drive on freeways.
They are not allowed to exceed 35 MPH.
They must always drive in the leftmost lane on highways.
They must stop before crossing railroad tracks.
Explanation

Vehicles with a diamond-shaped sign indicating a hazardous load are required to stop before crossing railroad tracks. This requirement is in place because hazardous materials can pose significant risks in the event of a collision or if the materials are released. Stopping allows the driver to ensure it is safe to cross and prevents accidents involving dangerous substances.

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