From 1 August 2018 foreign vehicles have to be registered if they want to enter the low emission zone in Brussels. 

Groningen in the Netherlands has transformed its city center into a large car-free zone. The setting prevents motorised vehicles from passing through the heart of the city.

Two of London's local authorities, Islington and Hackney will have a Zero Emission Zone from July 2018

London's ULEZ will be extended to the North/South circular boundary by 25th October 2021.