jmsbert
actually the area (https://www.openstreetmap.org/way/252298999) is not accessible anymore. There is a fence around and signs informing that it is prohibited to access.
I have reworked the mapping: 
removed non-exsting former parking area; added another parking space one along the highway; corrected the course of the highway referring to gpx + StravaHeatMap; also added the only remaining viewing point close to the highway. Will close this note now.