Speed cars buckets depending on speed limit for the street

The Speed Cars buckets should depend on the speed limit for the street. My S2 is counting a 80 km/h road (https://telraam.net/en/location/9000007659).
With 80 km/h, these buckets would be meaningful:

  • Up to 50 km/h
  • 50 - 60 km/h
  • 60 - 70 km/h
  • 70 - 80 km/h
  • 80 - 90 km/h
  • 90 - 100 km/h
  • 100 - 110 km/h
    • 110 km/h
      This buckets layout could be generalized with four buckets up to the speed limit and four buckets above speed limit.