evidence: With a shore length of about 270 km, Lake Constance is the third largest lake in Central Europe. The largest part of it, about 170 km, is in Germany, about a quarter in Switzerland and about 10% in Austria. The lake lies at just under 400 meters above sea level. [...] The official Lake Constance bike path logo is uniformly a cyclist with a blue rear wheel in all three countries Germany, Austria, Switzerland. However, the quality and visibility of the bike path signs varies greatly. In Germany, it is easy to miss a signpost in some places and go off the bike path. Due to the green-on-white optics, the readability is somewhat suboptimal. On the short Austrian section of the Lake Constance cycle path, confusion is most common.