What Is The Difference Between WLTP And RDE?

For WLRP a vehicle is driven for 30 minutes on a roller test stand under standard parameters, the RDE test takes place in the open street. For the RDE measurement a one third mixed route is used (1/3 city, 1/3 country. 1/3 highway). The RDE measurement takes between 90 and maximum 120 minutes.