CA Flagger Traffic Control Principles 3 — Questions and Answers
Question 1: What is the recommended minimum distance for advance warning signs on a highway with a posted speed of 65 mph?
- 100 feet
- 350 feet
- 500 feet
- 1,500 feet (Correct answer)
Correct answer: 1,500 feet
On highways with 65 mph speeds, the California MUTCD recommends advance warning signs placed approximately 1,500 feet ahead of the work zone.
Question 2: A flagger notices a large truck approaching too fast to stop safely. What is the BEST immediate action?
- Move out of the travel lane immediately (Correct answer)
- Hold position and continue signaling STOP
- Wave both arms to attract attention
- Run toward the oncoming truck
Correct answer: Move out of the travel lane immediately
Flaggers must prioritize their own safety; if a vehicle cannot stop safely, the flagger should move out of its path immediately.
Question 3: Which traffic control device is used to guide drivers through a lane shift or taper?
- Warning signs
- Channelizing devices such as cones or drums (Correct answer)
- Speed limit signs
- Flagging paddles
Correct answer: Channelizing devices such as cones or drums
Channelizing devices like cones, drums, and barriers physically guide vehicles through lane shifts and tapers within the TTC zone.
Question 4: What does a pilot car operation involve in a work zone?
- A police car that patrols the work zone
- A lead vehicle that guides traffic through the zone one direction at a time (Correct answer)
- A vehicle that transports flaggers between stations
- A car equipped with speed-detection equipment
Correct answer: A lead vehicle that guides traffic through the zone one direction at a time
A pilot car leads a controlled group of vehicles through a restricted work zone to ensure safe passage in one direction at a time.
Question 5: Under California regulations, what color must a flagger's safety vest or garment be to meet minimum standards?
- Solid yellow
- Fluorescent orange-red or fluorescent yellow-green (Correct answer)
- Solid orange
- White with reflective stripes
Correct answer: Fluorescent orange-red or fluorescent yellow-green
California requires flaggers to wear ANSI/ISEA Class 2 or higher apparel in fluorescent orange-red or fluorescent yellow-green with retroreflective material.
Question 6: What is the purpose of a merge taper in a temporary traffic control zone?
- To slow traffic approaching from the rear
- To direct traffic from a closed lane into an open lane (Correct answer)
- To indicate the end of the work zone
- To separate opposing traffic directions
Correct answer: To direct traffic from a closed lane into an open lane
A merge taper uses channelizing devices to guide vehicles from a closed lane into an adjacent open lane before the work area.
Question 7: Which hand signal is used by a flagger to stop traffic when a STOP paddle is unavailable?
- Both arms raised overhead
- One arm extended outward with palm facing traffic (Correct answer)
- One arm pointing downward
- Both arms crossed in front of the chest
Correct answer: One arm extended outward with palm facing traffic
When a paddle is unavailable, a flagger extends one arm outward with the palm facing toward approaching traffic to signal STOP.
CA Flagger Traffic Control Principles 3
What is the recommended minimum distance for advance warning signs on a highway with a posted speed of 65 mph?