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I-66 Active Traffic Management System

Improving safety and incident management from the D.C. line to Route 29 in Gainesville

Project Photos

Project at a Glance

Begin Date
August 2013

Est Completion Date
Construction completed March 2016

$39 million

Lengths and Limits
D.C. line to Route 29 in Gainesville


Arlington, Fairfax, and Prince William

Northern Virginia

Kamal Suliman
Regional Operations Director

Latest news: Overhead signs on westbound Interstate 66 create a new Route 28 exit lane during morning rush hour. Read more.

About the Project

This project installed an active traffic management (ATM) system on I-66 through Arlington, Fairfax and Prince William counties from the Washington, D.C., line to Route 29 in Gainesville.

The system has improved safety and incident management and includes new overhead sign gantries, shoulder and lane control signs, speed displays, incident and queue detection, and increased traffic camera coverage.

The overhead gantries were installed between the Beltway and Route 29 in Centreville.

TransCore designed and built the active traffic management system, which was activated in September 2015.

Construction was completed in March 2016.



Public information meeting presentation and video (July 2011)
ATM and I-66 project fact sheet and frequently asked questions
Project treatment definitions and conceptual design
Gantry variations
Other I-66 corridor initiatives

More information on similar projects in the U.S. and Europe:
Washington Department of Transportation (WSDOT)
U.S. Federal Highway Administration (FHWA)
United Kingdom Highways Agency

State project number: 0066-96A-917   UPC: 98017

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Page last modified: Sept. 19, 2017