Introducing a whole set of courses dedicated to learning about the diverging diamond interchange. These courses have been given in the past to audiences of students, public agency officials, and consultants. Now they are available to everyone. For more information about the diverging diamond interchange or to schedule a course in your area, please visit our website at www.divergingdiamond.com


I-75 at SR 72 (Clark Road) Interchange

Design Category: Diverging Diamond Interchange

The purpose of this project is to reconstruct the existing I-75 at Clark Road interchange facility to the ultimate configuration as defined in the Project Development and Environment Study (PD&E).{…}

I-75 and SR 884 (Colonial Boulevard) Interchange

Design Category: Diverging Diamond Interchange

The interchange of I-75 and Colonial Boulevard needs to be improved to accommodate future traffic growth due to development in the vicinity of the interchange and is anticipated to enhance{…}

Central US 1 Sector Plan Transportation Study

Design Category: Diverging Diamond Interchange

Identify and evaluate Transportation Demand Management (TDM) and mobility strategies to improve corridor. Developed typical sections and roadway plan for US 1 with innovative bicycle and pedestrian improvements. Evaluated transit{…}

Diverging Diamond Interchange Studies

Design Category: Diverging Diamond Interchange

Conducted many different studies related to the Diverging Diamond Interchange (DDI). Studies include Comparison of the DDI to Other Diamond Interchange Forms, Comparison of the DDI to Other Cloverleaf Forms,{…}

Greenbelt Metro TOD Project

Design Category: Diverging Diamond Interchange

A TOD project at the Greenbelt station on the DC Metrorail Green Line which is on the northeast side of the Capital Beltway. The project involves converting the large parking{…}

I-485 Design/Build, Charlotte

Design Category: Diverging Diamond Interchange

Converted a proposed 10-lane SPUI into a 7-lane Diverging Diamond Interchange (DDI) and eliminated another proposed bridge. This significantly reduced the construction costs of the project. Designed preliminary geometry of{…}

I-64/US 15 Diverging Diamond Interchange

Design Category: Diverging Diamond Interchange

Modified previously proposed DDI to improve operations and safety while reducing costs. Advised and checked all traffic and geometric aspects of DDI design. Assisted in revised Interstate Justification Report (IJR).{…}

I-75/SR 56 Interchange from East of CR 54 to West of Cypress Ridge Boulevard

Design Category: Diverging Diamond Interchange

The purpose of this project is to reconstruct the existing I-75 at SR 56 diamond interchange to a diverging diamond interchange (DDI). Specific improvements include modifying lane configurations to improve{…}

I-83 @ PA 851 Diverging Diamond Interchange Design

Design Category: Diverging Diamond Interchange

Converting existing tight diamond interchange with three lanes below I-83 bridge into a DDI. Providing expertise for geometric design and traffic operations.

I-89 @ US 7 DDI Plan Review

Design Category: Diverging Diamond Interchange

Reviewed geometric and traffic plans for proposed DDI. Comments included ways to provide safer design for pedestrians and motorists, improved traffic operations within the DDI and adjacent intersection, and improved{…}