Map of construction project districts

Under Construction

I-66 Widening

From Route 15 in Haymarket to Route 29 in Gainesville

Area Maps

Project at a Glance

Begin Date
April 2014

Est Completion Date
Fall 2016

$69.5 million

Lengths and Limits
0.5 mi west of Rt. 15 to 1.0 mi east of Rt. 29 (approx. 4.8 miles)

Prince William

Northern Virginia

Jeffrey S. Austin
Design-Build Project Manager
703-668-0288 ext. 25
Christiana Briganti-Dunn
VDOT Design-Build Project Manager

I-66 Widening Begins in Prince William County. View the press release.

About the Project

This project will add one high occupancy vehicle (HOV) lane and one general purpose lane to I-66 in each direction from just west of Route 15 to just west of Route 29 in Prince William County (about 2.6 miles). Additional work will continue to 1.0 mile east of Route 29 to provide appropriate pavement markings for the ultimate section. This will bring I-66 to a total of four lanes in each direction through this area (see typical section below), improving traffic flow to and from Haymarket, western Prince William and eastern Fauquier counties.

The project also includes:

  • Modifications to the existing westbound exit ramp at Route 15 (providing dual left turn lanes and a right turn bay), which will be constructed first.

On I-66 Mainline:

  • 12-foot paved shoulders
  • Reconstruction of two overpasses at Catharpin Road and Old Carolina Road/S. Jefferson Street to include a ten-foot shared-use path on each bridge
  • Intelligent Transportation Systems (ITS) components for managing traffic volumes, improving flow and enhanced incident response
  • Overhead sign structures
  • Utility relocations
  • Storm drainage and storm water management facilities
  • Retaining walls, sound barriers and roadway lighting on the two overpasses

Traffic Impacts

On or about April 7, 2014, construction will begin on the I-66 westbound off-ramp to Route 15 in the Town of Haymarket to provide an additional left turn lane. Work will proceed behind barrier during daytime hours. Motorists can expect a left shoulder closure and occasional off-peak lane closures for the next couple of months.

Beginning on or about April 13, 2014, first the I-66 westbound lanes and shoulders will be milled and overlaid, followed by the same for the I-66 eastbound lanes and shoulders. This work will be performed at night with lane closures for approximately six to eight weeks and will not impede rush hour traffic.

All work is weather permitting.

Preliminary Engineering $2.3 million
Right of Way $700,000
Construction $66.5 million
Total: $69.5 million

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

I-66 widening typical section



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: April 3, 2014