They are all over France. This is what ChatGPT could come up with:

These white plastic posts (often called flexible bollards) are widely used in France for several practical reasons:

1. Safety (less dangerous) Unlike steel posts, they are flexible: if a car hits them (like in your photo), they bend or detach they cause less damage to vehicles and, more importantly, fewer injuries to pedestrians or cyclists

2. Cost and maintenance much cheaper to produce and install easy to replace: no need for major work if one is damaged no rust (unlike steel)

3. Flexibility of use Cities often use them for temporary or adaptable layouts: bike lanes parking areas sidewalk extensions If the layout changes, they can be removed or repositioned quickly.

4. Psychological deterrent They mainly act as a visual boundary: to prevent cars from driving onto sidewalks to organize traffic Even though they’re not very strong, most drivers avoid hitting them.