This was an excellent seminar that introduced a number of innovative, real designs for improving intersection capacity. Well presented by an authoritative, knowledgeable presenter.  

Purpose and Background

This webinar provides current information on how to use innovative designs to optimize traffic flow at intersections and interchanges. This webinar will study geometric design of intersections and interchanges that use unconventional different geometric designs to increase the capacity of both existing and new intersections. The advantages and disadvantages of each of these designs will be presented. Designs such as Continuous Flow, Parallel Flow and other intersection designs that either eliminate or handle left-turn movements to reduce their impacts on intersection capacity will be presented.  There will be a special focus on Diverging Diamond Interchanges, new  Four-way Jug Handle intersections, as well as, other types of grade separated intersections and interchanges. Examples will be provided of what has been tried as well as what works and what does not. Additional resources on each topic will be identified and links to the web sites where simulations can be viewed will be provided.

Primary Topics of Discussion

• Geometric designs that improve the efficiency and safety of intersections
• Design changes in traditional interchanges to increase capacity and safety
• Examples of the best design options
• Design considerations to accommodate all road users
• Best source of technical information on innovative designs

Learning Outcomes

• Be exposed to the latest designs for intersections and interchange that have been used in some states and other countries to improve intersection capacities.
• Learn about the advantages and disadvantages of these designs.
• Gain knowledge from a special focus on Single Point Urban Interchanges and Diverging Diamond interchanges.

Webinar Benefits

• Gain a better understanding of intersection and interchange design
• Learn about the impacts of various designs on traffic flow
• Gain access to additional resources and references
• Learn from examples illustrating good and bad designs

Intended Audience

• Transportation engineers/planners
• Highway designers for all types of facilities
• Government officials

Webinar Outline

• Continuous Flow Intersections
• Parallel Flow Intersections
• Grade Separated Intersections
• Left-turn median crossovers
• Quadrant Roadways
• Split Intersections
• Pre-signal U-turns
• Four-way Jug handle intersections
• RCUTs
• Single Point Urban Interchanges
• Tight Diamond Interchanges
• Echelon Interchanges
• Diverging Diamond Interchanges (with Light Rail Facilities)
• RCIs and BBIs,
• Roundabout Interchanges

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