Arkansas Engineers - Modern Roundabout Design I

Instructor: Greg Taylor

Credit Hours: 3.00

Approval Number: Not Required


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Course Description


This course summarizes the geometric design process for modern roundabouts. Its contents are intended to serve as guidance and not as an absolute standard or rule.

Upon course completion, you should be familiar with the general design guidelines for modern roundabouts. The course objective is to give engineers and designers an in-depth look at the principles to be considered when selecting and designing roundabouts.



Course Objectives


This course is an introduction to the subject of modern roadway roundabouts. The contents of this document are intended to serve as guidance and not as an absolute standard or rule.

Course topics covered will include:
FHWA General Design Process
Principles and Objectives
Speed Management
Lane Arrangements
Appropriate Path Alignment
Design Vehicle
Non-motorized Design Users
Pedestrian Design Considerations
Bicycle Design Considerations
Sight Distances and Visibility

Size, Position, and Alignment of Approaches
Inscribed Circle Diameter
Alignment of Approaches
Angle between Approach Legs

Single-lane Roundabouts
Splitter Islands
Entry Width
Circulatory Roadway Width
Central Island
Entry Width
Exit Design
Design Vehicles

Upon course completion, the participant should be familiar with the fundamentals of modern roundabouts. The course will present various aspects to be considered when selecting and designing these intersections



Instructor Bio


Greg Taylor has worked for the Tennessee Department of Transportation as the Civil Engineering Manager since 1978. He is responsible for all types of roadway projects including State routes, bridges and estimates. He performs all phases of civil engineering design work including erosion control, hydrology, andgrading, while adhering to State regulations. He has also been a logistics and support officer for the Tennessee Air National Guard from 1985 to 2006. Greg hold a M.S. and B.S. in Civil Engineering from the University of Tennessee as well as an M.S. in Engineering Management also from the University of Tennessee.



Other Approvals


National Professional Engineer board: Not Required