About the Projects

Exit 140 Diverging Diamond Interchange and Courthouse Road Widening

About the Project

This $195 million project is rebuilding 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 is being 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 Opens on Saturday, Dec. 7 

The new diverging diamond interchange at Exit 140 is scheduled to open to traffic on Saturday, December 7, weather permitting. 

On Dec. 7, crews will open the new interchange to traffic, with assistance from Virginia State Police and local law enforcement. Opening the interchange early Saturday will allow crews to take advantage of lighter traffic volumes.

Read the news release on the DDI interchange opening to learn more. 

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

In addition to the interchange opening on Dec. 7, motorists can expect:

On Dec. 7, three of the new Exit 140 interchange ramps will open, but the I-95 southbound exit ramp to Courthouse Road will remain in a detour pattern until late December 2019.

Click here to view a map of the detour.

Motorists traveling from I-95 southbound to Courthouse Road should follow the posted detour signs to access the new Courthouse Road.

Traffic will be detoured for several weeks to allow crews to build the new exit ramp and raise its elevation to match the height of the new diverging diamond interchange and I-95 overpass bridges. Courthouse Road traffic is currently traveling in the location where this construction work must occur, once the ramp is detoured on Dec. 7.

Project Lane Closures 

A full list of weekly lane closures for VDOT's Fredericksburg District (which includes Stafford County) is available at www.VirginiaDOT.org. The list is posted Friday afternoons for the upcoming week.

Courthouse Road Park and Ride Lot

When construction is complete, two new Park and Ride lots for ridesharing will open east of I-95. The lots will have a total of approximately 1,100 parking spaces. 

The larger lot will have approximately 850 parking spaces and will include a dedicated transit and carpool / vanpool pickup and dropoff area to assist with High Occupancy Vehicle (HOV) use. A smaller lot on the north side of Old Courthouse Road will have an additional 250 parking spaces.

During July 2018, the existing Park & Ride lot on Courthouse Road was closed, and users were shifted to a temporary lot east of I-95 in the same location as the future, permanent lots. The existing 545 parking spaces will be available during construction as the contractor continues work to finish building the permanent lots. The new parking facilities will be open to traffic by July 31, 2020. 

VDOT asks that carpools, vanpools and transit riders continue ridesharing from this I-95 interchange during construction.

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 opens, and four lanes of Courthouse Road open between Austin Ridge Drive and Ramoth Church Road/Winding Creek Road

July 31, 2020: All construction work complete

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