In Design: Route 29 Widening in Fairfax County

Cost and schedule ►

Public outreach ►

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: $27 million
Construction: $63 million
Total: $95.7 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: August 2021
Award Design-Build Contract: Summer 2022
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: Feb. 16, 2022