Practice question

What is the 85th percentile speed?

  1. The speed at which 85% of vehicles are traveling faster
  2. The speed at or below which 85% of vehicles are traveling
  3. The average speed of the fastest 85% of vehicles
  4. 85% of the posted speed limit

Answer: B — The speed at or below which 85% of vehicles are traveling

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: PTOE Practice Questions - Professional Traffic Operations Engineer Exam Exam →