I-66 Outside the Beltway | USA

Project summary

Service provided:  Providing risk management and monitoring during a large transit project
Location:  Idylwood, Virginia - USA
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Client:  FAM Construction, a joint venture between Ferrovial Construction and Allan Myers, VA
Period of the service:  2019-2023
Sixense solutions used: 

Images of the project

I-66 Outside the Beltway Project


The Transform I-66 outside the Beltway project will revitalize Northern Virginia’s Interstate 66 into a multimodal corridor that moves more people, provides reliable trips, and offers new travel options.

The project is a public-private partnership between the Virginia Department of Transportation (VDOT), the Department of Rail and Public Transportation (DRPT), and I-66 Express Mobility Partners, delivering $3.7 billion in improvements to the corridor.


Monitoring System

Sixense was appointed to design a monitoring system to monitor potential deformation on neighboring structures including WMATA tracks and stations, highways, bridges, and more. Sixense implemented instrumentation on twenty different sites along the project, all with distinctive challenges that required innovative ideas on installation. This included:

  • Utilizing solar panels on the systems since continuous power was unavailable.
  • An automated monitoring system delivering measurements around the clock that were critical in identifying different movements and displacements that allowed mitigation plans to be executed quickly.
  • Utilizing our reflectorless solution, Centaur, to monitor the roadway surfaces during mining operations. This was achieved without causing any disruption to traffic or jeopardizing the safety of workers.


Solar Panels for Monitoring Construction Works - Sixense Northern America Monitoring Devices to Maintain Safety Standards on Transform 66 Monitoring Technology in Northern America - Sixense


I-66 Outside the Beltway Project Takeaways

The I-66 Outside the Beltway Project offered challenges that usually come with large transit projects, such as working at night. The job required day and night shifts, with night shifts specifically for tracks monitoring on the WMATA property. Safety also played a big role since they had to work on the highways and metro tracks at night.

Despite the obstacles, Sixense’s services assisted all the stakeholders in having more control over the project, reduced geotechnical and legal risks, and provided peace of mind to all involved parties. The Express Lanes opened in November 2022.


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Project Key figures

20 Total Stations
700 Prisms

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