In Design: Route 29 Widening in Fairfax County


Cost and schedule ►

Public outreach ►

Note: The noise barrier survey results are available to view here.

This project will reconstruct and widen 1.5 miles of Route 29 (Lee Highway) from four to six lanes between Union Mill Road and Buckleys Gate Drive. It will relieve a major bottleneck during AM and PM peak hours, with lengthy backups occurring in particular at the signal for Stringfellow/Clifton roads (Route 645).

The project will also correct vertical alignment to improve sight distance, add and improve shared-use paths on both sides of Route 29 and provide connectivity to pedestrian/bicycle trails at the Fairfax County Parkway/West Ox Road interchange. 

Estimated Costs
Preliminary Engineering: $5.7 million
Right of Way Acquisition and Utility Relocation: $26.1 million
Construction: $54.1 million
Total: $85.9 million

This project is financed with state (including Smart Scale) and local funding and the I-66 concession fee.

Route 29 within the project limits averages 34,000 vehicles a day, projected to increase to 44,000 vehicles a day by 2043.


This project aims to reduce congestion, improve safety, operations and access management, and enhance bicyclist and pedestrian accessibility and connectivity.

Major Milestones 

Public Information Meeting: October 2018
Design Public Hearing: June 2019
Begin Right of Way Acquisition: Fall 2020
Begin Construction: Fall 2023


Contact Info:

Hong "Jenny" Ha, P.E.
Location & Design

Andrew Beacher, P.E.
Preliminary Engineering

Project Photos

Other relevant links:

Noise Report Addendum - Barrier Survey Summary - August 2020

Final Noise Report and Appendices - April 2020

Categorical Exclusion - May 2019

Preliminary Noise Analysis - May 2019: Report | Appendices A-C | Appendices D-L

Previous Meetings >>

Phase: In Design

UPC: 110329

State ID: 0029-029-350, P101, R201, C501, D612

Federal ID: NHPP-5A01 (917)

Lat/Long: 38.840276, -77.398204

Locality: Fairfax

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Typical Section
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Existing four-lane section of Route 29

Page last modified: Aug. 26, 2020