public road parallel to döttinger höhe of the nordschleife

road highway lane infrastructure freeway transport asphalt racetrack track waterway overpass driving bridge vehicle tarmac walkway traffic nürburg germany 2021 brünnchen s-curves eschbach nordschleife originally 1927 built nürburgring eifel formula one 1970s nowadays race place tourist drive famous car tests performed hours hiking trail always open visitors winter calm empty seasonal sign parallel döttinger höhe adenau zufahrt autobahn speed public