| Question 1: Mandatory signs can also be used to issue instructions to all vehicles - common examples include "pass on this side" signs seen at roadworks, and "compulsory roundabout" signs seen at ________. | |||
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| Question 2: The mandatory sign group is not used in the United States and ________,[2][3] who are not signatories to the Vienna Convention; both countries consider them kinds of regulatory signs. | |||
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| Question 3: Mandatory signs are ________ which are used to set the obligations of all traffic which use a specific area of road. | |||
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