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Iowa driving lesson · Signs, Signals & Markings

Work zones

A 2-minute lesson from the Iowa course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
2 minutes
Course unit
Signs, Signals & Markings
Checkpoint questions
4
Source pages
14

Work zones mark construction, maintenance, survey, and utility work. Arrow boards, temporary signals, flaggers, and channelizing devices guide you through, and road workers are relying on you to keep them safe.

Know the rule

Stay alert and drive cautiously—fines may double in work area zones.

Handbook p. 14 ↗

Know the rule

Most work zone signs are diamond-shaped; a few are rectangular. Orange is the basic color of work zone signs and warning devices.

Handbook p. 14 ↗
Road work ahead
Orange work zone warning sign

In every work zone:

  • Adjust your speed to the traffic conditions
  • Obey all instructions from signs, traffic signals, and flaggers
  • Increase following distance
  • Give your full attention to driving
Handbook p. 14 ↗

Arrow boards

Large flashing arrow panels, typically used when a lane or shoulder is closed.

Handbook p. 14 ↗
Arrow panel
Arrow board

Flaggers

People with stop/slow paddles who control traffic. They wear fluorescent yellow-green or orange vests, shirts, or jackets; red flags may be used occasionally.

Handbook p. 14 ↗
Flagger stop paddle
Flagger with a STOP paddle

Channelizing devices

Barricades, vertical panels, drums, cones, and tubular markers that warn of unusual or dangerous conditions and guide you safely through the work zone.

Handbook p. 14 ↗
Road closed
Barricade

Know the rule

You must stop when instructed by a construction work zone flagger.

Handbook p. 41 ↗

Know the rule

Orange signs also warn of changing speed limits and workers on the road—watch for both.

Handbook p. 6 ↗

Put it into practice

A flagger holds up the STOP paddle at a lane closure. Stop and stay stopped until the flagger signals you to go, then drive through slowly with extra following distance.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

What is the purpose of an arrow board in a work zone?
  1. To signal a closed lane or shoulder
  2. To show the work zone speed limit
  3. To mark where flaggers are standing
  4. To show the location of the nearest exit

Answer: To signal a closed lane or shoulder

Large flashing arrow panels (arrow boards) are typically used when a lane or shoulder is closed.

Handbook p. 14 ↗
What color vests do flaggers typically wear in a work zone?
  1. Solid blue
  2. Fluorescent yellow-green or orange
  3. Plain white
  4. Bright red

Answer: Fluorescent yellow-green or orange

Flaggers should be wearing fluorescent yellow-green or orange vests, shirts, or jackets.

Handbook p. 14 ↗
Fines for traffic violations may triple inside a marked work zone.
  1. True
  2. False

Answer: False

False. The manual warns that fines may double in work area zones, not triple.

Handbook p. 14 ↗
Red flags may occasionally be used by flaggers in a work zone, in addition to stop/slow paddles.
  1. True
  2. False

Answer: True

The manual notes flaggers normally use stop/slow signs, but red flags may be used occasionally.

Handbook p. 14 ↗
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