Innovative Intersections and Interchanges

 

Overview | Implementation | VDOT junction screening | Success stories Innovative intersection committee Resources

Continuous Green-T (CGT) icon
Innovative Intersection: Continuous Green-T (CGT)
Diverging Diamond Interchange (DDI) icon
Innovative Intersection: Diverging Diamond Interchange (DDI)
Displaced Left Turn (DLT) icon
Innovative Interchange: Displaced Left Turn (DLT)
Median U-Turn (MUT) icon
Innovative Interchange: Median U-Turn (MUT)
Quadrant Roadway (QR) icon
Innovative Intersection: Quadrant Roadway (QR)
Restricted Crossing U-Turn (RCUT) icon
Innovative Intersection: Restricted Crossing U-Turn (RCUT)
Roundabout icon
Innovative Intersection: Roundabout
Single-Point Urban Interchange (SPUI) icon
Innovative Intersection: Single-Point Urban Interchange (SPUI)

Overview

The Virginia Department of Transportation (VDOT) is committed to improving safety and mobility for all road users.

Incorporating innovative intersections and interchanges into the transportation network is one of the strategies VDOT is using.

Today, congestion and safety problems on roadways are more complex than ever, and conventional intersection and interchange designs can be insufficient for resolving transportation problems at busy junctions.

Innovative intersection and interchange designs modify how vehicles, pedestrians and cyclists move at conventional intersections to provide transportation agencies and local communities with new options to reduce delay, increase efficiency and provide safer travel for all road users.

During the planning, design and construction phases of innovative intersections and interchanges, VDOT works with local jurisdictions to tailor the design to meet the specific needs at each location.

This page highlights different types of innovative intersections and interchanges, locations where innovative intersections and interchanges are constructed or planned for construction in Virginia and links to additional resources.

Implementation

Innovative intersections and interchanges are being designed and constructed throughout Virginia. Use the map to explore locations where innovative intersections and interchanges are built or planned.

View full screen map | Download VDOT innovative intersection inventory

VDOT Junction Screening Tool – VJuST

The VDOT Junction Screening Tool aids transportation engineers and planners in determining which innovative intersection and interchange configurations might be appropriate at a specific location.

VJuST logo

This tool helps in identifying the most appropriate intersection and interchange types to advance to further study, analysis and design.

It also helps identify innovative intersection and interchange configurations that have the potential for reducing congestion and improving safety.

Congestion results are based on user inputs such as turning movement volumes, number of lanes and lane configurations. Safety results are based on conflict points between users.

Results from the tool are not meant to replicate results obtained from more detailed traffic operations, safety and design analyses.

This tool is most applicable at isolated intersections or interchanges and does not account for the influence of adjacent intersections on traffic patterns.

However, the results may be indicative of how an intersection or interchange within a corridor might operate.

Successes

These intersection and interchanges have been met with positive responses around the state. One of the comments we've received:

"Just want to thank you for whoever designed the QRI roadway interchange at the north / south bridges over the Shenandoah River going into Front Royal. Traffic flow is great. Congratulations!"

— Lawrence in Front Royal

Innovative Intersection Committee

More information soon.

Resources

Federal Highway Administration

Also

Page last modified: April 27, 2018