Warning, Railroad and Work Zone Signs

Key points

1. Warning signs are usually diamond shaped and yellow with black lettering or symbols.

   Source: Handbook p. 48

   “They are usually diamond shaped and yellow with black lettering or symbols.”
   Utah Driver Handbook, Handbook p. 48

2. A round yellow sign with an X and RR means slow down, look and listen for a train.

   Source: Handbook p. 47

   “A round yellow warning sign with an “X” symbol and black “RR” cautions you to slow down, look, and listen for a train or railroad vehicle.”
   Utah Driver Handbook, Handbook p. 47

3. A white X shaped Railroad Crossing sign means stop behind the stop line when a train is coming.

   Source: Handbook p. 47

   “cautions that a train or railroad vehicle is coming and that you must stop behind the stop line or before the intersection.”
   Utah Driver Handbook, Handbook p. 47

4. Work zone signs are orange with black letters or symbols.

   Source: Handbook p. 49

   “Diamond or rectangular and orange with black letters or symbols. These signs warn you of work zones and people working on or near the road.”
   Utah Driver Handbook, Handbook p. 49

5. Fines for speeding in a work zone are doubled.

   Source: Handbook p. 49

   “Fines for speeding in a work zone are doubled.”
   Utah Driver Handbook, Handbook p. 49

6. At a short term work zone signal, stop at the white line if there is one.

   Source: Handbook p. 49

   “If there is a short-term signal, stop at the white line (if there is one.)”
   Utah Driver Handbook, Handbook p. 49

7. You must do as a flagger directs in a work zone.

   Source: Handbook p. 49

   “A flagger may direct traffic in a work zone. You must do as the flagger directs.”
   Utah Driver Handbook, Handbook p. 49

8. Always slow down in a work zone, even if there are no workers.

   Source: Handbook p. 59

   “Always slow down even if there are no workers.”
   Utah Driver Handbook, Handbook p. 59

Recognize these signs

3 questions from the Utah practice test

1. 1. What shape and colors do Utah warning signs usually use?

   1. Round and red with white letters
   2. Rectangular and blue with white symbols
   3. Pentagon shaped and green
   4. Diamond shaped and yellow with black lettering or symbols
   Show answer

   Diamond shaped and yellow with black lettering or symbols. Warning signs alert you to a hazard or a change in the road ahead, and the handbook says they are usually diamond shaped and yellow with black lettering or symbols. Learning that combination helps you recognize a warning from a distance before you can read it. A round red sign does not match the warning design the handbook describes, and the handbook lists green, brown, or blue rectangles as guide signs. When you see the yellow diamond, ease off the accelerator and look for the specific condition the symbol names.

2. 2. A flagger is directing traffic in a Utah work zone. What must you do?

   1. Follow the posted signs instead if they differ
   2. Do as the flagger directs
   3. Proceed if no workers are near your lane
   4. Obey the flagger only if the flagger is a police officer
   Show answer

   Do as the flagger directs. Work zones may involve lane closings, detours, and heavy equipment, and a flagger may direct traffic through them. The Utah handbook says you must do as the flagger directs. A flagger does not need to be a police officer for this rule to apply, and the absence of nearby workers does not change it. Watch for flagger signs well ahead, slow down, and be ready to stop quickly. Do not tailgate, and stay well away from workers and construction vehicles.

3. 3. What does the Utah handbook tell you to do if a short term signal in a work zone shows red?

   1. Proceed slowly through the signal
   2. Drive around the signal on the shoulder
   3. Sound the horn and wait for a flagger
   4. Stop at the white line if there is one, and be ready to stop quickly in work zones
   Show answer

   Stop at the white line if there is one, and be ready to stop quickly in work zones. The handbook says that if there is a short term signal, stop at the white line if there is one, and it adds the general rule to slow down in work zones and be ready to stop quickly. Creeping through, using the shoulder, or honking for a flagger are not options. Wait for the green and follow any flagger's directions. Once the signal turns green, watch for workers and equipment as you pass through the narrowed area.

Source: the Utah Driver Handbook, Section 9: Traffic Signs. This lesson is a plain English summary, not the law itself; where it differs, the manual and the statute govern. Last checked 2026-09-27.