Three-level Stacked Roundabout
The three-level stacked roundabout is a variation on the roundabout interchange in which both roads are grade-separated. It is similar to the three-level diamond interchange except that the small square of that latter interchange is enlarged to a true roundabout.
- Causeway Boulevard and Airline Highway, Metairie, Louisiana, has the traffic circle between the two roads.
- Staples Corner (A406 and A5), Dollis Hill, Greater London, has the roundabout on the ground.
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. Examples of such junctions are found at Lofthouse, West Yorkshire (M1/M62) and Swanley, Kent (M20/M25) .
| Map of all coordinates from Google Map of first 200 coordinates from Bing |
|---|
| Export all coordinates as KML |
| Export all coordinates as GeoRSS |
| Map of all microformatted coordinates |
| Place data as RDF |
Read more about this topic: Roundabout Interchange
Famous quotes containing the word roundabout:
“Life is a long Dardenelles, My Dear Madam, the shores whereof are bright with flowers, which we want to pluck, but the bank is too high; & so we float on & on, hoping to come to a landing-place at last—but swoop! we launch into the great sea! Yet the geographers say, even then we must not despair, because across the great sea, however desolate & vacant it may look, lie all Persia & the delicious lands roundabout Damascus.”
—Herman Melville (1819–1891)