Provided by: PDHengineer. com-Decatur Professional Development, LLC

Understanding 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. This course will provide information that will guide the engineer in planning, designing and constructing several types of roundabouts. Several traffic scenarios will be provided along with information to get a solution. This 10 hour course will also discuss the safety and operational characteristics of roundabouts and give crash statistics that will educate the reader on the positive effects of utilizing roundabouts.

The course materials are based solely on the materials "Roundabouts: An Informational Guide" as published on the website of the FHWA's Turner - Fairbank Highway Research Center.

The student must take a multiple-choice quiz consisting of forty-seven (47) questions at the end of the course to obtain PDH credits.

Specific Knowledge or Skill Attained

This course teaches the following specific knowledge and skills:
  • How traffic circles are used in the U.S.
  • Why roundabouts were developed
  • Key features of a roundabout
  • Speed designs for roundabouts
  • Geometric layout of roundabouts
  • Required traffic markings for roundabouts
  • How pedestrians and bicycle traffic fit into roundabout design
  • How to compare the cost of roundabouts to signalized intersections
  • The economies related to roundabout design
  • How to perform a benefit cost ratio for a build or no-build condition
  • How to design a roundabout to operate effectively with the current AADT
  • The environmental impacts of roundabouts
  • The capacity of roundabouts and their effects on traffic
  • How to determine the required queue length based on traffic volume.
  • The three key performances that should be known when designing a roundabout
  • The number of conflict points in a conventional intersection.
  • The number of conflict points in a roundabout
  • Why roundabouts have less conflict points than conventional intersections
  • Cross slopes in roundabouts
  • How central islands play a role in roundabouts
  • Typical pavement markings for roundabouts
  • How to design a lighting plan for roundabouts
  • How public meetings play a role in roundabout design
  • What raindrop islands are and how they are used
  • The side friction factor for various speeds
  • Steps to plan roundabouts
  • Maximum service volumes for roundabouts
  • How esthetics are considered at roundabouts
  • The relation between traffic delay and the environment
  • How roundabouts can reduce red-light running by eliminating the traffic signal, (Refer to the PDHengineer.com Course C-8004 Countermeasures to Reduce Red-Light Running for more in-depth and interesting information about red-light running that every driver should know.)
  • Required data to evaluate a roundabout
  • Most importantly, how the public will benefit from safer intersections and roadways

State Board Acceptance

This course can be used by professional engineers to fulfill PDH requirements mandated by state and provincial licensing boards. Decatur Professional Development is an approved provider of continuing education in all states that pre-approve course providers. In all other states that mandate continuing education for engineers, it is the individual engineer's responsibility to determine the suitability of activities for PDH credit. The state boards typically accept online* courses that cover technical, managerial** or ethical content and which are relevant to the practice of engineering. The course must have a clear purpose or objective with a content that will maintain, improve or expand the skills and knowledge of the licensee's field of practice. For questions about your mandatory PDH requirements, visit the website of your state licensing board.

*Online courses are accepted by all state licensing boards that mandate continuing education. Other than New York (which limits online courses to 18 PDH) and Iowa (which limits online courses to 6 PDH), there are no limits placed by other states on the number of hours that can be earned through online continuing education. Consult with your state licensing board if you have any questions about the acceptability of online courses.

**The New York State Board of Engineers does not accept general office management courses, but will accept project management courses that are offered by an approved provider and that are technical in nature and contribute to the engineer's professional practice.Please Note: Continuing Education credits for this course are awarded as PDH (Professional Development Hour Credits).
This is primarily online training
on-line e-learning cbt (computer based)This is an online eLearning or CBT training program
Training Presented in:English
Training Provided by PDHengineer. com-Decatur Professional Development, LLC
Understanding 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. This course will provide information that will guide the engineer in planning, designing and constructing several types of roundabouts. Several traffic scenarios will be provided along with information to get a solution. This 10 hour course will also discuss the safety and operational characteristics of roundabouts and give crash statistics that will educate the reader on the positive effects of utilizing roundabouts.

The course materials are based solely on the materials "Roundabouts: An Informational Guide" as published on the website of the FHWA's Turner - Fairbank Highway Research Center.

The student must take a multiple-choice quiz consisting of forty-seven (47) questions at the end of the course to obtain PDH credits.

Specific Knowledge or Skill Attained

This course teaches the following specific knowledge and skills:
  • How traffic circles are used in the U.S.
  • Why roundabouts were developed
  • Key features of a roundabout
  • Speed designs for roundabouts
  • Geometric layout of roundabouts
  • Required traffic markings for roundabouts
  • How pedestrians and bicycle traffic fit into roundabout design
  • How to compare the cost of roundabouts to signalized intersections
  • The economies related to roundabout design
  • How to perform a benefit cost ratio for a build or no-build condition
  • How to design a roundabout to operate effectively with the current AADT
  • The environmental impacts of roundabouts
  • The capacity of roundabouts and their effects on traffic
  • How to determine the required queue length based on traffic volume.
  • The three key performances that should be known when designing a roundabout
  • The number of conflict points in a conventional intersection.
  • The number of conflict points in a roundabout
  • Why roundabouts have less conflict points than conventional intersections
  • Cross slopes in roundabouts
  • How central islands play a role in roundabouts
  • Typical pavement markings for roundabouts
  • How to design a lighting plan for roundabouts
  • How public meetings play a role in roundabout design
  • What raindrop islands are and how they are used
  • The side friction factor for various speeds
  • Steps to plan roundabouts
  • Maximum service volumes for roundabouts
  • How esthetics are considered at roundabouts
  • The relation between traffic delay and the environment
  • How roundabouts can reduce red-light running by eliminating the traffic signal, (Refer to the PDHengineer.com Course C-8004 Countermeasures to Reduce Red-Light Running for more in-depth and interesting information about red-light running that every driver should know.)
  • Required data to evaluate a roundabout
  • Most importantly, how the public will benefit from safer intersections and roadways

State Board Acceptance

This course can be used by professional engineers to fulfill PDH requirements mandated by state and provincial licensing boards. Decatur Professional Development is an approved provider of continuing education in all states that pre-approve course providers. In all other states that mandate continuing education for engineers, it is the individual engineer's responsibility to determine the suitability of activities for PDH credit. The state boards typically accept online* courses that cover technical, managerial** or ethical content and which are relevant to the practice of engineering. The course must have a clear purpose or objective with a content that will maintain, improve or expand the skills and knowledge of the licensee's field of practice. For questions about your mandatory PDH requirements, visit the website of your state licensing board.

*Online courses are accepted by all state licensing boards that mandate continuing education. Other than New York (which limits online courses to 18 PDH) and Iowa (which limits online courses to 6 PDH), there are no limits placed by other states on the number of hours that can be earned through online continuing education. Consult with your state licensing board if you have any questions about the acceptability of online courses.

**The New York State Board of Engineers does not accept general office management courses, but will accept project management courses that are offered by an approved provider and that are technical in nature and contribute to the engineer's professional practice.Please Note: Continuing Education credits for this course are awarded as PDH (Professional Development Hour Credits).
About The Training Provider: PDHengineer. com-Decatur Professional Development, LLC
PDHengineer. com-Decatur Professional Development, LLC - PDHengineer is a leader in continuing education for licensed professional engineers. Offering online courses, live web seminars and live in-person seminars, PDHengineer. com has been trusted by tens of thousands of engineers around the country as a convenient, low-cost provider of state-board accepted PDH. We have well over 2000 hours of courses available online covering all engineering...
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