Map of construction project districts

Under Construction

I-66 Widening

From Route 15 in Haymarket to Route 29 in Gainesville

Area Maps

Project Photos

Project at a Glance

Begin Date
April 2014

Est Completion Date
August 2016

$65 million

Lengths and Limits
1.2 mi west of Rt. 15 to 1 mile east of Rt. 29 (approx. 4.8 miles)

Shirley Contracting

Prince William

Northern Virginia

Christiana Briganti-Dunn, P.E., CCM
Bill Atkins, CCM

Traffic Alert

The Virginia Department of Transportation will conduct overnight lane closures on eastbound I-66 Wednesday, June 29 and Thursday, June 30 between Route 15 and Route 29 in Gainesville, weather permitting, for crews to remove beams from the old Catharpin Road overpass.

Each night, single-lane closures will begin around 8 p.m. Intermittent total closures up to 20 minutes will begin around midnight. One lane will be reopened after each total closure, with all lanes reopened by 5 a.m.

Motorists should expect delays and are advised to use alternate routes.

About the Project

This project will add one HOV and one regular lane in each direction from Rt 29 in Gainesville to Rt 15 in Haymarket, improving traffic flow to and from Haymarket, western Prince William and eastern Fauquier counties. When complete in the summer of 2016, drivers will have three regular lanes and one HOV lane in each direction for 25 miles, from I-495 to Route 15.

Other improvements include:

  • Adding a left-turn lane on the I-66 westbound ramp to Rt.15 (completed June 2014)
  • Reconstructing overpasses at Old Carolina Rd./S. Jefferson St. (re-opened to traffic Dec. 2015) and Catharpin Rd. with ten-foot shared-use paths (Old Carolina shared-use path scheduled to open June 2016)
  • Intelligent Transportation System (ITS) components for managing traffic volume, improving flow and enhanced incident response
  • Overhead sign structures
  • Utility relocation
  • Storm drainage and storm water management facilities
  • Retaining walls, sound barriers, roadway lighting on the two overpasses
  • 12-foot paved shoulders

Estimated Costs
Preliminary Engineering: $2.3 million
Right of Way: $100,000
Construction: $62.1 million
Total: $64.5 million

Design approval - 2011
Award Design-Build Contract - August 2013
Begin construction -  April 2014
Complete construction - August 2016

Traffic Impacts

Motorists can expect lane closures during off-peak hours as well as occasional nighttime single-lane closures.

There are also certain activities for which there will be full stoppages of traffic: bridge beam erection, partial demolition of Catharpin Road bridge, and ultimately complete demolition.

After the Old Carolina Road bridge is complete, temporary lane closures and flagging operations at the approaches of the bridge will affect local traffic on Old Carolina Rd/Jefferson St.

I-66 widening typical section




Jefferson St/Old Carolina Rd bridge demolition meeting presentation (August 12, 2014)
"Pardon our Dust"
meeting presentation (May 8, 2014)
Draft environmental document (Categorial Exclusion)
Air quality analysis report
Noise analysis report , noise abatement design report and soundwall treatment samples 
Cultural resources survey report  
    Appendix A | B | C | D

Public hearing brochure (July 2011) and comments summary and responses
Project plan sheets (5MB)

State Project Number: 0066-076-003, P101, RW201, C501, B674, B675 Federal Project Number: NH-5A01(194)  
UPC: 93577

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Page last modified: June 28, 2016