A very serious question and NO Joke! Which traffic sign is valid? Unfortunately, the signs have been removed, so that I can only describe the situation and no longer show a photo. Through road … in a side road canal works are carried out. To this end a redirect sign has been placed on another road. On the said side road, which is about here, the following situation. Right on the through road stands a barrier grid with the indication: Only for residents and SACKGASSE. Approximately after 50 m the same game, because there is a road, also SACKGASSE, bends to LINKS. As far as so good, or not. On the thoroughfare now following situation, mindful, the right-hand side road is closed off half-way. Shortly before the side road a blue sign with arrow GERADEAUS and LINKS ABBIES is allowed! The right-hand side road is SACKGASSE and actually blocked! 2 m (!!!) Before the BLUE sign stands a UMLEITZUNGSSCH The dead end is now really a dead end, because it is blocked by construction work. After I had addressed a moped policeman to the situation, the signs were removed. Apart from the fact that the signs were not interested in anyone anyway, because many of them still turned off there, I am interested, WELCHE signposting is now valid? The policeman did not want to answer the question and first the situation. The result, signs are gone. Which sign would have been to be considered in doubt? IMPLEMENTATION or yet arrow GERADEAUS?? The impasse and ANLIENGER FREI is sometimes incidental.