The sign "Parking on sidewalks completely across in the direction of travel, right middle" indicates that parking is allowed on the sidewalk completely across the direction of travel for vehicles coming from the right side. This means that if you are driving on that road, you can park your vehicle on the sidewalk provided that it is done in a manner that fully clears the roadway and does not obstruct other vehicles or pedestrians.

It's important to be mindful of local regulations and conditions, as there might be additional rules such as time restrictions or requirements for certain types of vehicles. Always check for nearby signs to ensure you are parking legally.