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Intersection Geometric Design

COURSE NO: C04-033
COURSE PROVIDER: Gregory Taylor, P.E.
Intersection Geometric Design
Course Highlights

This online engineering PDH course summarizes and highlights the geometric design process for modern roadway intersections. It presents the general guidelines for at-grade intersection design and provides an in-depth look at the principles to be considered when selecting and designing intersections. The contents of this document are intended to serve as guidance and not as an absolute standard or rule.


Intersections are unique roadway elements where conflicting vehicle streams (and sometimes non-motorized users) share the same space. This area encompasses all modes of travel (pedestrian, bicycle, passenger vehicle, truck and transit) as well as auxiliary lanes, medians, islands, sidewalks and pedestrian ramps. These may further heighten the accident potential and constrain the operational efficiency and network capacity of the urban street system. However, the main objective of intersection design is to facilitate the roadway user and enhance efficient vehicle movement.


This 4 PDH online course is applicable to traffic or transportation engineers interested in learning about the principles to be considered when designing roadway intersections.

Learning Objectives

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

  • General design considerations: function, objectives and capacity
  • Alignment and profile
  • Sight distance: sight triangles and skew
  • Turning roadways: channelization, islands and superelevation
  • Auxiliary lanes
  • Median openings: control radii, lengths and skew
  • Left turns and U-turns
  • Roundabouts
  • Miscellaneous considerations: pedestrians, traffic control and frontage roads
  • Railroad crossings: alignments and sight distance
Course Document

In this professional engineering CEU course, you need to review the course document titled "Intersections". This course document is based exclusively on Chapter 9 of the American Association of State Highway and Transportation Officials (AASHTO) publication, "A Policy on Geometric Design of Highways and Streets" (also known as the "Green Book").

To view, print and study the course document, please click on the following link(s):
Intersection Geometric Design (3.5 MB)
Course Quiz

Once you complete your course review, you need to take a multiple-choice quiz consisting of twenty five (25) questions to earn 4 PDH credits. The quiz will be based on Chapter 9 of this AASHTO 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: