Bielefeld. Lawyer Siegfried Kammel is not an opponent of speed controls. If you are too fast, you have to stand up for it, he says. But when the drivers can’t even tell that they should slow down, then his heart rate goes up. “We have at least two places in Bielefeld where thousands of motorists have been flashed, but the city cannot prove that the decisive traffic sign was visible.” The public order office has therefore stopped its speed camera controls there. Artur-Ladebeck-Strasse. ..