Traffic Control Principles Flashcards

When a flagger uses a SLOW paddle, what does it instruct drivers to do?

Answer: Reduce speed and proceed with caution

The SLOW paddle instructs drivers to reduce their speed and proceed carefully through or past the work zone.

What is the primary purpose of a buffer space in a temporary traffic control zone?

Answer: To provide a safety margin between traffic and workers

Buffer spaces are safety margins placed between moving traffic and the work activity area to protect workers and equipment.

In a one-lane, two-way traffic control operation, which method allows traffic to self-regulate without a flagger?

Answer: Traffic signal operation

Temporary traffic signals can manage one-lane, two-way traffic without a flagger by cycling green and red phases for each direction.

Which of the following is NOT a standard component of a temporary traffic control zone?

Answer: Permanent road markings

Permanent road markings are not a component of a TTC zone; the four standard components are the advance warning, transition, activity, and termination areas.

What does the termination area of a traffic control zone accomplish?

Answer: Returns traffic to normal roadway conditions

The termination area is the end section of the TTC zone where traffic is transitioned back to its normal path and speed.

When flagging at night, which additional precaution is MOST important?

Answer: Wearing high-visibility retroreflective apparel

At night, flaggers must wear high-visibility retroreflective apparel so drivers can see them clearly in headlight illumination.

What action should a flagger take if a driver refuses to obey flagging instructions?

Answer: Note the vehicle description and notify law enforcement

Flaggers have no authority to physically detain vehicles; they should document vehicle details and report the incident to law enforcement.