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Preventing Wrong-Way Driving on Freeways

COURSE NO: C06-013
Preventing Wrong-Way Driving on Freeways
Course Highlights

This online engineering PDH course identifies the contributing factors to wrong-way crashes on freeways and develops promising, cost-conscious countermeasures to reduce these driving errors and their related crashes.  Factors found to be significant are alcohol impairment, age, gender, physical condition, driver's experience and knowledge, time of day, and interchange type.  Vehicle type, seat belt use, lighting, roadway alignment, driver age group, first vehicle contact point, and driver condition (blood alcohol concentration level) are shown to have an impact on crash severity.  Types of countermeasures such as signage, pavement markings, geometric design, and ITS vehicle detection systems are discussed. Applications to twelve specific interchanges are presented.


Driving the wrong way on freeways has been a consistent traffic safety problem since the interstate system was opened in the 1950s.  From 1996 to 2000 alone, over 1,700 people were killed and thousands more were injured in wrong-way crashes in the United States.  The average direct economic loss from such crashes is estimated to be over ten million dollars per year.


This 6 PDH online course is intended for civil and transportation engineers, design professionals, construction personnel and others concerned with the design and operation of highways.

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
  • Familiarizing 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, "Preventing Wrong-Way Driving on Freeways" which is based on the Illinois Center for Transportation (ICT) report ICT-R27-90, "Investigation of Contributing Factors Regarding Wrong-Way Driving on Freeways", October, 2012, by Huaguo Zhou, Jiguang Zhao, Ryan Fries, Mostafa Reisi Gahrooei, Lin Wang, Brent Vaughn, Karzan Bahaaldin, and Balasubrahmanyam Ayyalasomayajula.
To view, print and study the course document, please click on the following link(s):
Preventing Wrong-Way Driving on Freeways (8.1 MB)
Course Quiz
Once you complete your course review, you need to take a multiple-choice quiz consisting of thirty five (35) questions to earn 6 PDH credits. The quiz will be based on this IDOT/ICT publication.
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: