Under Construction: I-95 Southbound Auxiliary Lane in Prince William County
Cost and schedule ►
Public outreach ►
The auxiliary lane opened to traffic in May 2023.
Construction began in June 2021, read more in the news release.
The Categorical Exclusion environmental document became available in June 2020 and can be viewed here. The public notice can be viewed here.
A design public hearing was held in December 2019.
Please note: The auxiliary lane is now open to traffic.
Psst, the 95SB Aux Lane (between Route 123 and PW Pkwy) is open!— VDOT Northern VA (@VaDOTNOVA) May 15, 2023
P.S. Happy Monday! pic.twitter.com/FoIE4bBnX9
This project created an auxiliary lane on southbound Interstate 95 from Route 123 (Gordon Boulevard) to Prince William Parkway (Route 294).
The project converted about a mile and a half of the existing shoulder to a travel lane between the ramp from southbound Route 123 and the ramp to westbound Prince William Parkway. The project also provided a new paved shoulder, relocated noise walls as needed, replaced impacted roadway lighting, installed or upgraded guardrails and built new retaining walls.
Southbound I-95 averages about 80,000 vehicles a day in this area.
Preliminary Engineering: $3.5 million
Construction: $20.2 million
Total: $23.7 million
The project is being completed as part of the I-95 Corridor Improvement Plan, and is financed with a portion of the concession fee provided under the 95 Express Lanes Project Comprehensive Agreement.
Check out the below videos of an aerial simulation and driving simulator demonstration:
The auxiliary lane aims to make it easier for drivers to merge into and out of traffic between the ramps.
Public Information Meeting (Interstate 95 Corridor Improvement Plan) - October 2019
Design Public Hearing - December 2019
Categorical Exclusion Available - June 2020
Advertise for Construction - December 2020
Award Construction Contract - March 2021
Begin Construction - June 2021
Ribbon-Cutting Ceremony - April 2023
Auxiliary Lane Open to Traffic - May 2023
Final Completion - Late Spring 2023
Mehrdad Naderi, P.E.
Other relevant links:
Auxiliary Lane Opening News Release - May 2023
Construction Start News Release -
Categorical Exclusion Document and
Ad - June 2020
Design Public Hearing - Dec. 2019 (Ad)
Meeting Materials and Displays
I-95 Corridor Improvement Plan
Public Information Meeting (Interstate 95 Corridor Improvement Plan) - October 2019 (Ad)
Major funding source: 95 Express Lanes Concession Fee
Phase: Under Construction
State ID: 0095-076-276, C501, P101
Federal ID: RSTP-0952 (542), STP-0952 (547)
Lat/Long: 38.667756, -77.269957
Locality: Prince William