Geometric Design of Roundabouts
In Geometric Design of Roundabouts, you'll learn ...
- The principles and objectives common to the design of all categories of roundabouts
- Size, position and alignment of roundabout approaches
- Speci?c guidelines for the design of individual geometric elements at single-lane and multilane roundabouts
- Design criteria for mini-roundabouts
Overview
Traffic circles have been used in the U.S. since 1905. The modern roundabout, developed in the United Kingdom, was developed to rectify problems associated with traffic circles.
Roundabout design is an iterative process where a variety of design objectives must be considered and balanced within site-specific constraints. Maximizing the operational performance and safety for a roundabout requires the engineer to think through the design rather than rely upon a design template.
In this course, you’ll learn guidelines for the geometric design of single-lane, multilane and mini-roundabouts.
Learning Objectives
Upon completion of this course, participants will be able to:
- Describe the proper placement of bike lanes at roundabouts.
- Identify the recommended widths and dimensions of splitter islands.
- Explain the superelevation used for various speeds.
- Describe the dimensions of truck aprons.
- Identify roundabout entry and exit widths.
- Explain specific guidelines for the design of single-lane roundabouts.
- Describe specific guidelines for the design of multilane roundabouts.
- Identify design considerations for mini-roundabouts.
- Explain treatments for high-speed approaches.
- Describe pedestrian, bicycle, and parking considerations.
- Explain the characteristics of diamond and single-point diamond interchanges.
Certificate of Completion
You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 30 questions. PDH credits are not awarded until the course is completed and quiz is passed.
| This course is applicable to professional engineers in: | ||
| Alabama (P.E.) | Alaska (P.E.) | Arkansas (P.E.) |
| Delaware (P.E.) | District of Columbia (P.E.) | Florida (P.E. Area of Practice) |
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| Illinois (S.E.) | Indiana (P.E.) | Iowa (P.E.) |
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| Ohio (P.E. Self-Paced) | Oklahoma (P.E.) | Oregon (P.E.) |
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