CTSP CTSP Ground Operations and Traffic Control 1 — Questions and Answers
Question 1: Under OSHA 1926.201, when tree work is performed adjacent to a public roadway, who is responsible for establishing a traffic control plan?
- The employer or crew supervisor (Correct answer)
- The property owner
- The municipal traffic department only
- The individual groundworker
Correct answer: The employer or crew supervisor
The employer or designated supervisor must develop and implement a traffic control plan in compliance with OSHA 1926.201 before work begins near roadways.
Question 2: What color are the traffic cones typically required for road work zones in the United States?
- Orange (Correct answer)
- Yellow
- Red
- Green
Correct answer: Orange
Orange traffic cones are the US standard for temporary traffic control zones, providing high visibility to approaching drivers.
Question 3: The Manual on Uniform Traffic Control Devices (MUTCD) requires that flaggers use which type of paddle for stop/slow operations?
- A STOP/SLOW paddle with red and orange faces (Correct answer)
- Any brightly colored flag
- A white glove and hand signal only
- A flashing red light
Correct answer: A STOP/SLOW paddle with red and orange faces
The MUTCD requires flaggers to use a STOP/SLOW paddle — red on the STOP side and fluorescent orange-red on the SLOW side — for traffic control.
Question 4: What is the minimum personal protective equipment (PPE) required for a ground crew worker in an active work zone?
- High-visibility vest, hard hat, and safety footwear (Correct answer)
- Hard hat only
- Safety glasses and gloves only
- High-visibility vest only
Correct answer: High-visibility vest, hard hat, and safety footwear
OSHA and ANSI Z133 require ground crew in active work zones to wear at minimum a high-visibility vest, hard hat, and safety footwear.
Question 5: Which ANSI/ISEA standard covers high-visibility safety apparel used in US roadway work zones?
- ANSI/ISEA 107 (Correct answer)
- ANSI Z87.1
- ANSI Z41
- ANSI Z133
Correct answer: ANSI/ISEA 107
ANSI/ISEA 107 is the American standard that specifies performance requirements for high-visibility safety apparel used in roadway work environments.
Question 6: When positioning a wood chipper in a work zone, what is the safest orientation of the discharge chute?
- Away from workers, the public, and traffic — typically into a truck or away from the road (Correct answer)
- Toward the street to clear debris faster
- Toward the climber's base position
- Directly downward to create a pile beneath the chipper
Correct answer: Away from workers, the public, and traffic — typically into a truck or away from the road
The discharge chute must be aimed away from all personnel and traffic to prevent ejected material from striking workers or bystanders.
CTSP CTSP Ground Operations and Traffic Control 1
Under OSHA 1926.201, when tree work is performed adjacent to a public roadway, who is responsible for establishing a traffic control plan?