Important about picture n° 3
Upon reaching the wooden sign that reads "PREVO," you must 
turn right onto the private road. This turn is quite narrow, and if your
 vehicle is large or has a low suspension, you may encounter 
difficulties making the turn. In such cases, I recommend continuing for 
another 300 meters towards Corniglia until you find a suitable spot to 
maneuver. You can then turn your vehicle around and return to enter the 
private road without any issues.