Périphérique intérieur vs. extérieur 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.
Périphérique intérieur vs. extérieur The Périphérique consists of two concentric carriageways: the intérieur ("inner ring") and the extérieur ("outer ring"). Vehic.les 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.