Boulevard Périphérique in Paris

The Boulevard Périphérique, often called the Périph, is a controlled-access dual-carriageway ring road in Paris (France). With a few exceptions, 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.

The Périphérique consists of two concentric carriageways: the intérieur (“inner ring”) and the extérieur (“outer ring”). Vehicles travel clockwise on the inner ring and counterclockwise on the outer ring. Stretches of the road are sometimes referred to by cardinal direction. For example, in the southern half of the highway, the “inner ring” is designated as the Périphérique Ouest (“Western Ring”), as traffic there flows westbound, whereas the “outer ring” is designated as the Périphérique Est (“Eastern Ring”), as traffic flows eastbound. In the northern half, these designations are reversed.

Total length: 35.04 km (21.77 mi)
Average trip length: 7 km (4.3 mi)
Speed limit: 70 km/h (43 mph)
Average speed on working days (7:00 am–9:00 pm): 43 km/h (27 mph).

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