In Design: Route 50 Corridor Improvements in Fairfax and Loudoun Counties

Cost and schedule ►

This project will make safety and operational improvements at several locations along a six-mile stretch of Route 50 (John S. Mosby Highway) between Gum Spring Road (Route 659) and Centreville Road (Route 657).

Route 50 averages up to 71,000 vehicles a day within the project limits. 

Estimated Costs
Preliminary Engineering: $1.3 million
Construction: $9.4 million
Total: $10.7 million

The project is financed with federal, state (including Smart Scale) and Loudoun County funding.


The project aims to relieve congestion and improve safety and operations.

Major Milestones 

Begin Preliminary Engineering: April 2019
Begin Construction: To be determined


Contact Info:

W. Calvin Britt, P.E.
Location & Design

Kimberly McCool, P.E.
Preliminary Engineering

Phase: In Design

UPC: 114827, 114828

State ID: 0050-053-211, P101; 0050-M10-010, P101

Lat/Long: 38.911217, -77.473252

Locality: Fairfax and Loudoun

Page last modified: March 25, 2023