MTJ Provides Design Support for Mini Roundabout Pilot Program

Annandale, VA
Ravensworth Road intersection of Fountain Head Dr – Jayhawk St


Mini Roundabout in Annandale, VA
Photo Credit: VDOT

The Federal Highway Administration (FHWA) began a pilot program to examine anew modular approach to construct mini roundabouts that use prefabricated materials, like raised islands made from engineered plastic developed from recycled plastic bottles, which allowed for ease of installation at a lower cost.

MTJ Roundabout Engineering, provided the traffic planning and roundabout design for this application, in conjunction with ZKxKZ, LLC of Lexington, MA, which was responsible for the manufacturing of the materials for the mini-roundabout.

The roundabout layout/design and color specifications provided by MTJ were instrumental in creating a safer environment for all modes while preserving the capacity of the intersection.

The previous intersection was dangerous for traffic entering from side streets, for making left turns, and particularly hazardous for pedestrians.

The Virginia Department of Transportation (VDOT) reported that this project required no new pavement, utility relocations, drainage, or other work which kept costs significantly lower than other alternatives.

Wei Zhang, of FHWA, commented: “If the materials and design are successful, we may be able to consider similar modular roundabouts as an option where safety and congestion improvements are needed quickly.”

To learn more about the project, or see a video, please use the following links:


For other questions, please contact leaders on the project team:

Mark Johnson, PE
MTJ Roundabout Engineering

Jerry Fanucci

Wei Zhang, PhD, PE

Terry Yates, PE