Communication Methods Flashcards

When a flagger cannot be seen by the pilot car driver due to a curve, what communication method should be used?

Answer: Use a two-way radio to coordinate

Two-way radios allow flaggers and pilot car drivers to coordinate safely when line-of-sight is obstructed.

Which hand signal tells approaching traffic to stop?

Answer: One arm extended horizontally with palm facing traffic

The STOP signal requires the flagger to face traffic with one arm extended horizontally and palm facing oncoming vehicles.

What does a flagger do when using a SLOW paddle to communicate with drivers?

Answer: Hold it stationary and face it toward approaching traffic

A SLOW paddle is held stationary and displayed face-on to approaching drivers to indicate reduced speed ahead.

At night or in low-visibility conditions, what communication aid must California flaggers use?

Answer: High-visibility retroreflective apparel and illuminated devices

California requires flaggers to wear retroreflective apparel and use illuminated or lighted devices during nighttime or low-visibility operations.

If a flagger needs to alert workers of an incoming vehicle that has not slowed, what is the best immediate action?

Answer: Sound a horn or whistle to warn workers

A horn or whistle provides an immediate audible warning to workers in the work zone when a vehicle fails to comply.

What is the purpose of a flagger using predetermined whistle signals during a work zone operation?

Answer: To provide standardized alerts to workers without radio communication

Predetermined whistle signals give workers consistent, recognizable audible alerts when radios are unavailable or impractical.

Which of the following is NOT an approved method for a California flagger to communicate with approaching drivers?

Answer: Verbal shouting as the primary signal

Verbal shouting is not a reliable or approved primary communication method; approved tools include paddles, flags, and radios.