The Boulevard Périphérique, often called the Périph, is a limited-access dual-carriageway ring road in Paris, France. With a few exceptions, it is situated along Paris's administrative limit.
The Boulevard Périphérique Extérieur near Porte d'Aubervilliers
A portion of the Thiers wall, near Porte de Versailles, before it was torn down and replaced by an autoroute.
Paris' Périphérique by night at Porte d'Italie
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 offering an alternate route around the city for drivers who do not need to stop in the city core. Ring roads can also serve to connect suburbs to each other, allowing efficient travel between them.
The Third Ring Road in the area of the Moscow International Business Center.
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.
I-275 passing through Sharonville (suburb of Cincinnati, OH)
The Anthony Henday Drive ring road in Edmonton