Hi, 
On the basis of our driver feedback and cross verifying it with private street imagery, I found the following issue to exist in this location. Since the street imagery is older, I would like to check if the issue still exist in this location. If you are going to survey or have local knowledge of this vicinity, please make necessary changes in OSM.
 Issue : Missing speed restriction on  211502045 service road
Street Location : 48.6325226, 8.0667185
 Proof : Sign board (2018)
 Correction: Add speed restriction (30 zone ) on  211502045 service road
Regards,
Neerdixi