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Detection for Traffic Signals

COURSE NO: C02-057
Detection for Traffic Signals
Course Highlights

This online engineering PDH course presents information regarding vehicle and pedestrian detection systems used in modern traffic signal control.  The material is intended to provide a practical overview of detection types, components and operational characteristics.


Vehicle detection is used for a variety of traffic control purposes. Detectors are used to:

  • Count vehicles;
  • Operate gates at exits of parking garages and other restricted entrances;
  • Control vehicles entering a freeway ("ramp metering");
  • Provide incident detection on freeways by measuring speeds and other traffic characteristics;
  • Provide Automatic Vehicle Identification (AVI) for automatic toll collection;
  • Provide emergency vehicle detection for use in signal preemption; and
  • Control actuated traffic signals.


This 2 PDH online course is intended for traffic engineers and transportation design professionals who are involved in the planning and design of detection systems for traffic signals.

Learning Objectives

This PE continuing education course is intended to provide you with the following specific knowledge and skills:

  • Recognizing the various components of a traffic signal detection system
  • Knowing the effect of detector length and location on signal operation
  • Understanding the advantages of non-locking operation
  • Recognizing the various types of underground and overhead detection
  • Understanding how to calculate the inductance of a loop assembly
  • Becoming familiar with the steps involved in loop installation and testing
  • Knowing how to provide dilemma zone protection through detection design
  • Understanding the basic of pedestrian detection
Course Document

In this professional engineering CEU course, you need to review the course document titled, "Detection for Traffic Signals".

To view, print and study the course document, please click on the following link(s):
Detection for Traffic Signals (5.4 MB)
Course Quiz
Once you complete your course review, you need to take a multiple-choice quiz consisting of fifteen (15) questions to earn 2 PDH credits. The quiz will be based on the entire document.
The minimum passing score is 70%. There is no time limit on the quiz, and you can take it multiple times until you pass at no additional cost.
Certificate of Completion

Upon successful completion of the quiz, print your Certificate of Completion instantly. (Note: if you are paying by check or money order, you will be able to print it after we receive your payment.) For your convenience, we will also email it to you. Please note that you can log in to your account at any time to access and print your Certificate of Completion.

To buy the course and take the quiz, please click on: