In Finland dollies 5th wheel steering angle is limited to 30°.
Ball bearing in Nordic countries: mandatory on dollies, not always on trucks, with limitation to +/-20 or 30° according to the country. This is for combination stability on slippery surface. (5th wheel is still free, only the bearing is blocked.
The chair questioned whether these steering tables’ provisions should be limited to Nordic countries or extended to others. The chair and the Nordic countries representatives committed to investigate the pros and cons of lockable ball bearing systems in their territories.

Conclusion:

• Need for more information
• Informal group to clarify the kind of requirement relevant for this item:
  • should such dollies be covered by UN R79?
  • if yes: how? Locked/unlocked, with which load, which vehicles behind?