What does the ANSI Z133 standard require regarding work zone setup when arborists are working adjacent to public roadways?
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A
Arborists must notify the police department 24 hours before beginning roadside tree work
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B
Appropriate traffic control measures — including signage, cones, flaggers, and in many cases traffic control permits — must be established to protect workers and the public before work begins near traffic
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C
Crews working within 50 feet of a road must wear orange reflective vests but no other traffic control is required
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D
Only licensed traffic control companies may establish roadway work zones — arborists are prohibited from placing any traffic control devices