Under Construction: Interstate 95 / Route 630 (Courthouse Road) Interchange Relocation and Route 630 Widening

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This $195 million project has rebuilt the Interstate 95 interchange at Exit 140 (Route 630/Courthouse Road) in Stafford County as a diverging diamond interchange (DDI). 

The new Exit 140 interchange is located slightly south of the existing interchange, with new overpasses carrying Courthouse Road traffic over the interstate.

The new Courthouse Road aligns with an extended Hospital Center Boulevard, which connects with Route 1 directly across from Stafford Hospital. 

West of I-95, Courthouse Road was widened to four lanes as far west as Ramoth Church Road and Winding Creek Road. 

Project Design: Courthouse Road Widening

Project Design: Exit 140 Interchange

Project Design: Exit 140 interchange (side view)

DIVERGING DIAMOND INTERCHANGE NOW OPEN

The new diverging diamond interchange over Interstate 95 at Exit 140 (Courthouse Road) opened to traffic on Saturday, December 7, 2020.  

Watch the Exit 140 DDI simulation video for an aerial and windshield view.

Courthouse Road Park & Ride Lot Access Change: October 2019 

Access to the Park & Ride commuter lot on Courthouse Road changed in October 2019 after a new side entrance to the lot opened from Wyche Road on Florida Rock Drive. View an online map of the upcoming access change at the Park & Ride lot.

Florida Rock Drive serves as the only entrance and exit to the Park & Ride lot until construction is complete in spring 2020. Construction is underway through spring 2020 to build a larger lot with additional parking spaces and new amenities. 

Benefits 

  • Diverging Diamond Interchanges (DDIs) lower the number of conflict points between vehicles by eliminating left turns.
  • The new interchange briefly shifts vehicles on Courthouse Road to the other side of the road on new overpass bridges, which allows drivers to merge left onto the I-95 northbound and southbound ramps without stopping at a traffic signal.
  • A wider Courthouse Road provides more lane capacity, and a new connection with Route 1. 
  • The intersection Ramoth Church Road and Winding Creek Road has been realigned. New traffic signals were added to the entrance of Colonial Forge High School and the Liberty Knolls subdivision, and the intersection of Ramoth Church Road and Winding Creek Road. 
  • Two new Park & Ride lots with a combined 1,100 parking spaces are under construction as part of this project. The new lots are located east of I-95. During construction, a temporary lot remains open with 545 parking spaces to provide continuous Park & Ride access at Exit 140. 
  • By spring 2020, the finished Park & Ride lots will open with a dedicated pickup and dropoff area for buses, carpools, vanpools and public transit. 

Major Milestones 

July 2017: Construction begins

December 7, 2019: Diverging Diamond Interchange (DDI) opens to traffic, along with the four-lane, extended Hospital Center Boulevard from Route 1 to the new Courthouse Road and DDI 

Late December 2019: Final I-95 southbound exit ramp opened, and four lanes of Courthouse Road opened between Austin Ridge Drive and the intersection of Ramoth Church Road and Winding Creek Road

Spring 2020: Anticipated completion of Park & Ride lots and sidewalk construction from Old Courthouse Road to Stafford County Government Center

July 31, 2020: All construction work must be complete, under contract

Resources

Other relevant links:

Diverging Diamond Interchange (DDI)

A diverging diamond interchange (DDI) is an innovative design that is increasingly being used by state transportation departments.

The ramp configuration is similar to a traditional diamond interchange.

However, traffic on the cross street, Courthouse Road, will switch sides.

Traffic is shifted to the left side of the road, which allows vehicles turning left to enter an interstate on-ramp without stopping at a traffic signal.

Frequently asked questions

YouTube simulation of diverging diamond interchange at Interstate 64 and Route 15, Zion Crossroads, Louisa County, Virginia

A traffic analysis, in the form of an Interchange Modification Report, has been performed on the diverging diamond interchange concept.

The findings, approved by the Federal Highway Administration, are below.

Supplement to the Interchange Modification Report

Phase: Under Construction

UPC: 13558, 4632

State ID: 0095-089-F09, 0630-089-202

Federal ID: C00013558DB83

Lat/Long: 38.422108, -77.423058

Locality: Stafford

Page last modified: March 18, 2020