Note: The descriptions of interchanges apply to countries where vehicles drive on the right side of the road. For left-side … See more

The concept of the controlled-access highway developed in the 1920s and 1930s in Italy, Germany, the United States, and Canada. Initially, these roads featured at-grade intersections along their length. Interchang… See more

A system interchange connects multiple controlled-access highways, involving no at-grade signalised intersections.
A cloverleaf interchange is a four-legged junction where left turns across opposing traffic are h… See more

Service interchanges are used between a controlled-access route and a crossroad that is not controlled-access. A full cloverleaf may be used as a system or a service interchange.
A diamond … See more

• Free-flow interchange
• Grade separation
• Intersection (road)
• Junction (traffic)
• Unused highway… See more

• Glossary – Part of the publication Highway Design Handbook for Older Drivers and Pedestrians by the Turner-Fairbank Highway Research Center branch of the U.S. Federal Highway Administration
• Kurumi.co… See more