The Boulevard Périphérique (French pronunciation: [bulvaʁ peʁifeʁik]), often called the Périph, is a controlled-access dual-carriageway ring road in Paris, France. With a few exceptions (see Structure and Layout), it is situated along Paris's administrative limit. The speed limit along the Périphérique is 70 km/h (45 mph). Each ring generally has four traffic lanes, with no hard shoulder. Its major interchanges are called portes. At junctions, vehicles in the rightmost lane (separated from other lanes in these areas by a continuous white line to the left) must yield to entering vehicles. When travelling at the legal speed limit, it takes approximately 30 minutes to complete a full circuit of the Périphérique. From Wikipedia
