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Which of these vehicles must always stop before crossing railroad tracks?
A.  Tank trucks marked with hazardous materials placards.
B.  Motor homes or pickup trucks towing a boat trailer.
C.  Any vehicle with three or more axles and weighing more than 4,000 pounds.
Trucks transporting hazardous loads must stop before they cross railroad tracks.
Answer Statistics
33.44 % of our users get this question wrong.
This questions is considered quite Hard

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