CTSP CTSP Ground Operations and Traffic Control 4 — Questions and Answers
Question 1: When a tree crew is working adjacent to a two-lane road with no shoulder, what is the MINIMUM recommended buffer distance between the work zone and active traffic lanes per ANSI Z133?
- 5 feet
- 10 feet (Correct answer)
- 15 feet
- 20 feet
Correct answer: 10 feet
ANSI Z133 recommends a minimum 10-foot buffer between the work zone and the nearest active traffic lane when no shoulder exists.
Question 2: A ground worker notices a limb is about to fall in an unexpected direction. The FIRST action should be to:
- Shout a warning to all personnel and move to the pre-designated escape route (Correct answer)
- Contact the climber via radio immediately
- Place additional cones around the drop zone
- Stop the chipper and wait for the all-clear
Correct answer: Shout a warning to all personnel and move to the pre-designated escape route
Immediate audible warning and movement to the pre-planned escape route is the priority to protect all workers from the unexpected hazard.
Question 3: Which type of traffic control device is used to guide drivers through a temporary work zone by physically separating travel lanes from the work area?
- Channelizing devices (cones, drums, barriers) (Correct answer)
- Warning signs only
- Flaggers positioned at each end
- Variable message signs
Correct answer: Channelizing devices (cones, drums, barriers)
Channelizing devices such as cones, drums, and barriers physically separate and guide traffic through or around a temporary work zone.
Question 4: Under the MUTCD, the minimum distance for an advance warning sign on a road with a 45 mph speed limit in a typical urban environment is approximately:
- 100 feet
- 200 feet
- 350 feet (Correct answer)
- 500 feet
Correct answer: 350 feet
The MUTCD prescribes approximately 350 feet advance warning sign spacing for a 45 mph urban roadway to give drivers adequate reaction time.
Question 5: A crew is chipping brush alongside a residential street. Which PPE item is MOST critical to prevent hearing damage from the chipper?
- Safety glasses
- Hard hat
- Hearing protection (ear plugs or muffs) (Correct answer)
- High-visibility vest
Correct answer: Hearing protection (ear plugs or muffs)
Wood chippers produce noise levels commonly exceeding 100 dB, making hearing protection essential to prevent noise-induced hearing loss.
Question 6: When positioning a wood chipper on a jobsite, it should be oriented so that the discharge chute:
- Faces toward any active traffic lanes to minimize chip travel distance
- Faces away from workers, the public, and any structures (Correct answer)
- Points upward to reduce ground litter
- Points toward the truck bed at all times regardless of surroundings
Correct answer: Faces away from workers, the public, and any structures
The discharge chute must be aimed away from workers, bystanders, and structures to prevent injury from ejected material.
Question 7: When a flagger in a tree work zone signals 'STOP,' drivers who have already entered the taper area should:
- Accelerate through the work zone quickly
- Stop immediately and remain stopped until the flagger signals to proceed (Correct answer)
- Reverse back out of the taper
- Proceed at reduced speed past the flagger
Correct answer: Stop immediately and remain stopped until the flagger signals to proceed
Once a flagger displays STOP, all vehicles must halt and wait for the flagger's signal before proceeding, even if already in the taper.
CTSP CTSP Ground Operations and Traffic Control 4
When a tree crew is working adjacent to a two-lane road with no shoulder, what is the MINIMUM recommended buffer distance between the work zone and active traffic lanes per ANSI Z133?