Definition:

An interchange is a type of road junction where a major road crosses a minor road. The major road is grade-separated from the minor road where one crosses the other over a bridge. The interchange type should be selected based on site specific needs and constraints.

Benefits:

• Provides for free-flowing traffic along the major roadway by grade separating the minor roadway.
• Eliminates all delay for the major roadway.
• Improves safety by reducing the risk of various crash types.