A wheel loader is clearing snow from a high-traffic urban street. There are multiple overhead streetlights and utility lines, some of which are difficult to discern in low light conditions. The loader's maximum height with the boom fully raised is approximately 5.5 metres. The provincial OHS specifies a minimum 3.0-metre clearance zone for high-voltage lines. What is the MOST effective control measure to prevent contact with overhead hazards in this scenario?

Question: A wheel loader is clearing snow from a high-traffic urban street. There are multiple overhead streetlights and utility lines, some of which are difficult to discern in low light conditions. The loader's maximum height with the boom fully raised is approximately 5.5 metres. The provincial OHS specifies a minimum 3.0-metre clearance zone for high-voltage lines. What is the MOST effective control measure to prevent contact with overhead hazards in this scenario?

Answer options:

• Rely solely on the operator's vigilance and site familiarity. ✅ Assign a dedicated signal person (spotter) to guide the loader in areas with overhead hazards.
• Reduce the loader's operating speed to a minimum.
• Install additional flashing lights on the loader's cab.

Correct answer: Assign a dedicated signal person (spotter) to guide the loader in areas with overhead hazards.

Explanation: Provincial OHS regulations (e.g., Alberta OHS Code Part 18, Section 280) and CSA Z150.1-16 'Safety Code for Mobile Cranes' principles for mobile equipment strongly recommend or mandate a dedicated signal person when equipment operates near overhead electrical conductors or other overhead obstructions, especially when clearance is uncertain or visibility is poor.