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FHWA Home / Safety / Intersection / Crossover Intersections | Intersection Safety

Crossover Intersections

Some intersection designs direct some or all traffic to cross over to the left–hand side of the roadway to facilitate unopposed left–turn movements. These designs can improve safety and reduce congestion at the intersection.

The two most common crossover–based designs are the diverging diamond interchange (DDI) and the displaced left–turn (DLT) Intersection.

Outreach and Education Resources

Diverging Diamond Interchanges

Displaced Left–Turn Intersections

Technical Materials and Research

Diverging Diamond Interchanges

Displaced Left–Turn Intersections

Connections to Other Transportation Safety Topics

Image sources: About Intersection Safety: MoDOT, FLKR, licensed under CC BY 2.0.; Safe System Intersections: deberarr, iStock/Getty Images Plus; Intersection Control Evaluation: CreativeNature_nl, and smolaw11, iStock/Getty Images Plus; Stop–Controlled Intersections: James Andrews, iStock/Getty Images; Corridor Access Management: FHWA; Roundabouts: FHWA; Crossover Intersections: FHWA; Reduced Left–Turn Conflict Intersections: FHWA; Signalized Intersections: FHWA; Other Intersection Designs: NCDOT
Page last modified on March 12, 2021
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Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000