Any good?
The lower image is similar to the old gradient posts used in the UK.
The values are OK. The arms show whether the gradient is climbing or falling. The post in your image will have been placed at the bottom of a dip with the track rising in each direction.
Magandy (kuid:68236 ) has made some posts with renameable climbing, level and falling arms. There are six which cover each possible combination.
You can find them on the DLS under Gradient post. Make sure the TRS2004 box is checked.