Roundabout interchange

Roundabout interchanges are extremely common in the United Kingdom and Ireland with hundreds on the motorway network alone.

Roundabout interchanges are much less common in North America but have been built more frequently since 1995, to improve safety, and to reduce traffic delays and bridge widening costs.

A divided diamond, in which the minor road is separated into four intersections, rather than two, also acts like a roundabout interchange, but it is more square in shape and, typically, has traffic light control.

[1] Three-level stacked roundabouts are quite common in Britain because they use less land than other four-way junctions where both roads are grade separated.

However, they have lower capacity for turning movements – some have had direct-linking slip roads added later in an attempt to solve this problem.

Antalyaspor Interchange of Antalya . The underpass serve the transit traffic of city center to Konyaaltı , while the upper part Dumlupınar Bulvarı and roundabout are maintained by General Directorate of Highways as D-400 Highway.
The western entryway into Linköping , Sweden (a branch off the backbone E4 highway) passes on a bridge above this roundabout, which connects a national road and a local road into a residential area with ramps leading up to the free-flowing road (note the green signage denoting that in these directions you are entering a motorway ).
Motorways crossing in the Czech Republic.
The Rottepolderplein in the Netherlands is a three-level roundabout