S Bahn Service S19 Duren to Koln. The line speed approaching Koln progressively steps down to 80 Km/h to 70 Km/h and 50Km/h. The 2 x yellow speed triangles either side of Koln Ehrenfeld (80Km/h), 1 x triangle 1.7km from Koln-Hansaring (70Km/h), and 1 x triangle 125m from Koln-Hansaring (50Km/h), are all sitting on their bases, and not inverted to show a speed reduction ahead. My stream (from 37 mins) may be helpful. https://www.twitch.tv/videos/1257014474
