It is not allowed to turn left from Route de la Chapelle to Route de Saint-Julien by car. Only public transportation can turn left at this crossroad.

There is a connection between Route de la Chapelle and Chemin de Compostelle.
On the other end, Chemin de Compostelle is not connected to Chemin de Trèfle-Blanc.

There is no connection between Chemin du Trèfle-Blanc and Chemin de Compostelle.
Chemin de Compostelle is connected to Route de la Chapelle.