A ring road is a road or a series of connected roads encircling a town, city or country. The most common purpose of a ring road is to assist in reducing traffic volumes in the urban centre, such as by
M25, the primary ring road of London
The Third Ring Road in the area of the Moscow International Business Center
The Autostrada A58, the Milan external east ring road, Italy. Together with the Autostrada A50 (Milan west ring road), the Autostrada A51 (Milan east ring road) and the Autostrada A52 (Milan north ring road), it is the largest system of ring roads around a city in Italy, for a total length greater than 100 kilometres (62 mi).
The Leeds Inner Ring Road in England was built in a series of tunnels to save space and avoid physically separating the city's centre from its suburbs.
Beijing possesses multiple ring roads.
Ring road
…Houston, Texas will have three official ring roads (not including the downtown freeway loop). Some cities have far more – Beijing, for example, has six ring roads, simply numbered in increasing order from the city center (though skipping #1), while Moscow has five, three innermost (Central Squares of Moscow…
The eastern 3rd Ring Road (August 2004 image)
The northwestern 4th Ring Road (July 2004 image)
The northeastern 5th Ring Road (March 2003 image)