These example questions are intended to show the style and presentations used in the certification examination. They are not necessarily representative of all possible areas of examination or levels of difficulty. None of these example questions appear in an actual examination.

1. In determining road-user characteristics for design purposes, the value MOST commonly used is the:
   1. Mean.
   2. Median.
   3. 85th percentile.
   4. 95th percentile.
      
      
2. Which of the following are indications of a need to investigate installation of a new, isolated traffic control signal?
   I. Growth/change in traffic demand.
   II. Increased crash rate.
   III. Increased speeding violations.
   IV. Increased citizen requests for traffic control devices.
   1. I and IV only.
   2. I and III only.
   3. II and III only.
   4. I, II and IV only.
      
      
3. According to AASHTO policies, a low-speed rural collector road should be provided with a minimum clear zone of _______.
   1. 1.5 m.
   2. 3.0 m.
   3. 6.0 m.
   4. 12.0 m.
      
      
4. What measure will typically provide the greatest benefit/cost ratio in terms of improved safety at railway/roadway grade crossings?
   1. Flashing lights replacing signs only.
   2. Replacement of grade crossing with grade separation.
   3. Automatic gates replacing signs only.
   4. Automatic gates replacing active devices such as flashing lights.
      
      
5. Assume a 60-second cycle length and a desired speed of 30 mph. What is the ideal spacing between signals for two-way progression?
   1. 440 ft.
   2. 880 ft.
   3. 1,320 ft.
   4. 2,640 ft.
      
      
6. All of the following are different ways an accident experience can be summarized. What factor normally is the LEAST significant in analyzing a hazardous intersection?
   1. Age of vehicle.
   2. Type of crash.
   3. Severity of injuries and/or damage.
   4. Time period.
      
      
7. There is a sharp curve on a rural collector highway with an 80 km/h speed limit. The safe speed on the curve is determined to be 56 km/h. What is the MOST appropriate sign display for this condition?
   1. One or more chevron signs.
   2. A turn sign with advisory speed plaque.
   3. A 55 km/h speed limit sign.
   4. A curve sign with advisory speed plaque.
      
      
8. Four vehicles travel along a street at constant speeds of 35, 30, 25 and 20 mph. What is their approximate space mean speed?
   1. 24.3 mph.
   2. 26.3 mph.
   3. 27.5 mph.
   4. 30.2 mph.

Answer Key

Problem 1—C 
Problem 2—D 
Problem 3—B 
Problem 4—A 
Problem 5—C 
Problem 6—A
Problem 7—D
Problem 8—B